OPINION
LANE, Presiding Judge:Clarence Scott, Appellant, was tried by jury for the crime of Possession of a Controlled Dangerous Substance with Intent to Distribute after Former Conviction of a Felony (63 O.S.1981, § 2-401(B)(2)) in Tulsa County District Court, Case No. CF-88-2348. The jury returned a verdict of guilty of the primary charge and not guilty of former conviction. The trial court sentenced appellant in accord with the jury’s verdict to twenty-five (25) years imprisonment. The appellant raises five propositions of error; two regarding evidence, two regarding the jury instructions, and prose-cutorial misconduct. The State concedes, and we find, that the jury was instructed incorrectly regarding the possible length of sentence. We affirm the judgment and remand this case to the trial court for resentencing pursuant to 22 O.S.Supp.1990, §§ 929 and 1066.
Sometime on June 7, 1988, a confidential informant bought PCP at an upstairs apartment in the Vernon Manor Apartment complex in North Tulsa and reported the buy to police. On the morning of June 8, 1988, several Tulsa Police Officers arrived at the apartment to serve a search warrant. Officer Whittingham went around to the back while others served the warrant at the front door. At about the same moment he heard the police announce their presence, he saw the appellant throw a Crown Royal bag out of a window of the apartment. The bag landed about five (5) feet from him. He retrieved the bag and discovered that it contained four (4) vials containing phencyclidine (PCP), several empty vials, and a bottle of food coloring in a brown pouch. The vials contained approximately thirty-five (35) doses of PCP which had an estimated street value of $175.00. Officer Yelton who was one of the first officers to enter the apartment saw the appellant in the kitchen at the back of the apartment when he entered. He also seized a bag in plain view on the living room sofa which contained twenty-eight (28) vials of PCP.
The appellant argues that the evidence did not prove his intent to distribute and was therefore insufficient to sustain his conviction. To support this position he first argues that the bag of twenty-eight (28) vials of PCP which was admitted into evidence was not shown to be in his possession. Appellant also attacks the credibility of Officer Whittington who stated he only got a “glimpse” of the appellant tossing out the Crown Royal bag. To bolster this credibility argument the appellant relies on the conflicting testimony of Officer Kurow-ski, who followed several seconds behind Officer Whittington, that a brown paper sack was thrown from the window.
Intent is a state of mind that will be proven, if at all, by circumstantial evidence. See Foster v. State, 714 P.2d 1031 (Okl.Cr.1986), cert. denied 479 U.S. 873, 107 S.Ct. 249, 93 L.Ed.2d 173 (1986). Circumstantial evidence by its nature requires *76the jury to use it to draw reasonable inferences. On appellate review this Court accepts all reasonable inferences which tend to support the jury’s verdict Williams v. State, 721 P.2d 1318 (Okl.Cr.1986), and the evidence will be found to be sufficient if it excludes every reasonable hypothesis except that of guilt. Riley v. State, 760 P.2d 198 (Okl.Cr.1988).
The fact that the bag which the appellant threw from the window contained approximately thirty-five (35) doses of PCP with a street value of $175.00, as well as empty vials which are used in the trade for dipping cigarettes in single doses for sale supports the jury’s finding of intent to distribute. The fact that Officer Whitting-ton observed the appellant briefly, and that another officer testified that a brown paper bag was thrown from the window goes to the weight and credibility of Whittington’s testimony. The task of resolving this conflict is not for the appellate court, but rather for the jury which is the exclusive judge of weight of the evidence and the credibility of the witnesses, Raymond v. State, 717 P.2d 1147 (Okl.Cr.1986). The jury in this case chose to believe Officer Whittington. The jury’s finding of intent is supported by the record and will not be disturbed on appeal.
Appellant next argues that an evi-dentiary harpoon prevented him from receiving a fair trial. The alleged harpoon occurred after Officer Whittington testified that marijuana had been found in the apartment and the trial judge specifically admonished the State to “stick to PCP”. Whittington then testified:
Q. So a total of eight hundred and seventy-five dollars worth of controlled drug at street value found inside this apartment?
A. Right.
Q. Okay.
A. In addition to the other — the marijuana. There was also marijuana.
This Court has clearly defined the six (6) characteristics of evidentiary harpoons:
(1) they are generally made by experienced police officers, (2) they are voluntary statements; (3) they are wilfully jabbed rather than inadvertent; (4) they inject information concerning other crimes; (5) they are calculated to prejudice the defendant; and (6) they are prejudicial to the rights of the defendant on trial.
Pierce v. State, 786 P.2d 1255, 1260 (Okl.Cr.1990); Bruner v. State, 612 P.2d 1375, 1378 (Okl.Cr.1980). Given the fact that the trial court only moments before had cautioned the prosecutor to “stick to PCP”, we have no doubt that Officer Whittington, an experienced officer who by his own admission had testified hundreds of times in trials of drug related offenses, intended to hurl an evidentiary harpoon.
Immediately after Officer Whittington attempted to hurl this defective harpoon, the trial court admonished the jury to disregard the testimony regarding marijuana.
The trial court’s admonition to the jury will cure this error unless the evidence admitted is so prejudicial that common sense tells us the jury could not disregard it in reaching its verdict. See Sullivan v. State, 716 P.2d 684 (Okl.Cr.1986). The un-eontroverted evidence established that the appellant threw a sack containing four vials containing thirty-five doses of PCP out the apartment window, and twenty-eight vials of PCP were recovered inside the apartment. This is strong, if not overwhelming evidence that the appellant possessed PCP with the intent to distribute it. Under these facts we do not find that the evidence that the appellant also possessed marijuana contributed to the jury’s determination of guilt. Admonition by the trial court was sufficient in this case to cure this evidentiary error.
The appellant did not request a cautionary instruction on the eye-witness identification by Officer Whittington, but now claims that the trial court erred by not so instructing sua sponte. Appellant has waived all but fundamental error by his failure to request this instruction. Davis v. State, 753 P.2d 388, 392 (Okl.Cr.1988); Hair v. State, 597 P.2d 347, 349 (Okl.Cr.1979).
*77A cautionary instruction is required only when eye-witness identification is a critical element of the prosecutor’s case and serious questions exist concerning the reliability of the identification. Davis at 392, McDoulett v. State, 685 P.2d 978, 980 (Okl.Cr.1984). No serious question regarding reliability of the identification is raised where, as here, the witness had the opportunity to observe the subject clearly, was positive in the identification, remained positive and unqualified even after cross-examination, and did not fail previously to identify the subject. See Batson v. State, 724 P.2d 253 (Okl.Cr.1986). While the amount of time which an eye-witness observed a subject may effect the opportunity to observe clearly, a brief observation is not necessarily unclear. The record does not support the appellant’s position that serious questions regarding the eyewitness identification by Officer Whittington existed. The trial court had no duty to give a cautionary instruction in this case.
Although no contemporaneous objections were lodged, the appellant now argues he was prejudiced by prosecutorial misconduct during closing argument. Therefore, we again review for fundamental error only. Dangerfield v. State, 742 P.2d 573 (Okl.Cr.1987). None of the challenged comments are so grossly improper as to require reversal. We find no fundamental error.
The appellant argues, and the state agrees, that improper instruction on the range of punishment requires that his sentence be modified. Although defense counsel did not object to the improper instruction, improper statement of the applicable law is fundamental error which can not be waived and which may be corrected when raised for the first time on appeal. See Ellis v. State, 749 P.2d 114, 116 (Okl.Cr.1988).
The jury should have been instructed under 63 O.S.Supp.1986, § 2-401(B)(2) that the possible sentence was not less than two (2) years nor more than twenty (20) years imprisonment. Instead the trial court instructed the jury that the possible punishment was five (5) years to life imprisonment. Evidently the judge based his instruction on 63 O.S.Supp.1986, § 2-401(B)(l), the punishment for possession of a narcotic or L.S.D. with the intent to distribute. The appellant argues his sentence must be modified to the statutory minimum.
In a non-capital case where the Court has determined that a sentence is infirm due to trial error it may exercise one of three options; modify within the range of punishment1, modify to the minimum punishment allowable by law2, or remand to the trial court for resentencing3. The strong statutory policy of the State of Oklahoma is that a criminal defendant be sentenced by jury. 22 O.S.1981, § 926. Therefore, when modifying a sentence, this Court has analyzed the apparent reasoning behind the jury assessment of punishment so that the resentencing does not do violence to it.
Where we have found prosecutorial misconduct inflamed the jury and the sentence shocks the conscience of the Court, we have reduced the sentence within the range of punishment to eliminate the part of the sentence which was apparently driven by improper prejudice. See fn. 1; see also Jackson v. State, 763 P.2d 388 (Okl.Cr.1988); Spees v. State, 735 P.2d 571 (Okl.Cr.1987); Davis v. State, 763 P.2d 109 (Okl.Cr.1988), cert. denied 489 U.S. 1055, 109 S.Ct. 1319, 103 L.Ed.2d 588 (1989). Where the jury was improperly instructed on the range of punishment, we were left with little guidance as to what punishment the jury would have given had it been properly instructed, and opted for the minimum stat*78utory punishment. See fn. 2. Where the jury was improperly instructed regarding enhancement, we have modified sentence to the maximum unenhanced sentence. See Mitchell v. State, 781 P.2d 331 (Okl.Cr.1989).
At the time these cases were decided there was some question as to whether the Court had the authority to remand a case to the district court for resentencing. Compare Nipps v. State, 626 P.2d 1349 (Okl.Cr.1981) (remand for resentencing when sentencing statute declared unconstitutional); Dean v. State, 778 P.2d 476 (Okl.Cr.1989) (no statutory authority to remand for resentencing). This question was recently resolved when the Oklahoma Legislature granted the Court clear statutory authority to remand a case to the district court for resentencing where necessary or proper. See 22 O.S.Supp.1990, §§ 929 and 1066.
In the present case we are unable to determine the reasoning which supports the jury’s recommended sentence. The jury was improperly instructed on an open-ended range of punishment, five (5) years to life, and set punishment at twenty-five (25) years. This sentence is not the maximum possible under'the incorrect instruction, yet it is beyond the maximum allowable. Any attempt to compute an equivalent proper sentence mathematically is futile, or worse, lends an air of apparent certainty to mere speculation. Under the present circumstances we therefore find that it is both necessary and proper that we remand this matter to the trial court for resentencing.
BRETT and JOHNSON, JJ., concur. PARKS, P.J., and LUMPKIN, V.P.J., concur in the result.. See e.g. Scott v. State, 751 P.2d 758 (Okl.Cr.1988), cert. denied 490 U.S. 1114, 109 S.Ct. 3176, 104 L.Ed.2d 1037 (1988) (prosecutorial misconduct); Treece v. State, 753 P.2d 377 (Okl.Cr.1988) (prosecutorial misconduct); Wade v. State, 624 P.2d 86 (Okl.Cr.1981) (cumulative trial error).
. See e.g. Clopton v. State, 742 P.2d 586 (Okl.Cr.1987); Ellis v. State, 749 P.2d 114 (Okl.Cr.1988).
. See Nipps v. State, 626 P.2d 1349 (Okl.Cr.1981).