There was nothing hurtful in the anaesthetic administered to the plaintiff, and the fact that he was put under its influence is material only in determining the amount of care which the defendants *441were called upon to exercise. They knew that the plaintiff, while under the influence of the anaesthetic, had no control of his faculties ; that they were powerless to act, and that he was unable to exert the slightest effort to protect himself from any-of the probable or possible consequences of the operation which they had undertaken to perform. He was in their charge and under their control to such an extent that they were required to exercise the highest professional skill and diligence to avoid every possible danger, for the law imposes duties upon men according to the circumstances in which they are called to act. In this case skill and diligence must be considered as indissolubly associated. The professional man, no matter how skillful, who leaves an essential link wanting or a danger unguarded in the continuous chain of treatment is guilty of negligence, and if the omission results in injury to the patient, the practitioner is answerable.
The defendants were employed to take the diseased tooth out; instead of doing which they allowed part of it to go down the plaintiff’s throat. This was out of the ordinary coarse of treatment, and how such an unusual result was brought about was a fact peculiarly within the knowledge of the defendants, which they were required to explain, and it was for the jury to say whether their explanation was satisfactory or not.
The quantum of evidence necessary to make out a prima fade case of negligence is very slight in some cases, while in others a more strict proof is required. Often the injury itself affords sufficient prima fade evidence of negligence. Thus, a bailee who returns in an injured condition an article which has been loaned to him is, by this very condition, called upon for an explanation; for a presumption of fault must arise therefrom againt him. Although the mere happening of an accident is not in general primafade evidence of negligence,- yet the accident- may be of such a nature *442that negligence must be assumed, from the unexplained fact of the accident happening. Thus, B., while walking in a street in front of the house of a flour dealer, was injured by a barrel of flour falling upon him from an upper window; it was held that the mere fact of the accident was evidence to go to the jury in an action against the flour dealer (Byrne v. Boadle, 2 H. & C. 722; 33 L. J. Ex. 13 ; see also Scott v. London Docks Co., 3 H. & C. 596 ; 34 L. J. Ex. 17, Ex. Ch.). There was evidence offered by the plaintiff showing that while the defendant drew the tooth the forceps slipped. This fact, combined with the unusual circumstance that the tooth went down instead of coming up, was sufficient to carry the case to the jury upon the question of negligence. The trial judge held that while the affirmative was upon the plaintiff to prove negligence, the fact that the defendants, instead of taking the plaintiff’s tooth out, let it go down his throat, was sufficient evidence to carry the question of negligence to the jury, bo the end that they might determine whether, in the light of all the circumstances, the defendants had exercised the skill and care which the exigencies of the case require. This ruling was correct, and the exception thereto is not well taken. The case was fairly tried and submitted to the jury, and their verdict, in view of all the facts, and the pain and suffering which the plaintiff endured, eánnot be said to be improper nor excessive. It follows that the judgment must be affirmed, with costs.
Hawes and Hyatt, JJ., concurred.