167 Mass. 39 | Mass. | 1896
The only eyewitness of the accident was a fellow workman, who was turning the crank of the hand-car on the left, while Morrissey was turning it on the right. Ac-' cording to his statement, he himself was pulling on the crank, and Morrissey was pushing, when Morrissey suddenly went out of the car over the crank, head first. The witness further stated that he did not know what caused the accident, that nothing happened to his side of the crank so far as he noticed, and that it turned all right, smooth, without any trouble. We assume that there was evidence that the box, when pulled on as it would be in climbing a hard grade, would rise enough to allow the gears to slip. But there was no other evidence connecting the defendant with Morrissey’s fall.
We are of the opinion that the judge was right in taking the case from the jury on the ground that it would be mere conjecture, at the best, if the injury should be attributed to slipping of the gears. Such a case is not to be left to the jury unless the court can say that the jury are warranted from their experience as men of the world in saying that the accident is more likely to happen from the alleged defect than from other possible causes. If, on the other hand, the court can see that common experience does not warrant such a judgment, it is its duty to direct a verdict. In this case it seems to us that it cannot be said that the fall was more likely to happen from the slipping of a gear than from some one of the other causes for which the defendant was not responsible. Morrissey’s clothes may have caught on the crank, as in Carey v. Boston & Maine Railroad, 158 Mass. 228, or he may have lost his- balance by too violent a motion, or he may have been seized with vertigo. The cause relied on has to be set against the total of other possible causes. We cannot admit that common experience may have furnished the jury with data as to the relative frequency of the different chances sufficient to enable them to pronounce a rational determination. It is a practical question with reference to the particular facts of the case, but it is one of those practical questions upon which the court have to exercise their judgment in the first place before submitting it to any one else. See Doyle v. Boston & Albany Railroad, 145 Mass. 386, 387, 388. The plaintiff’s evidence, which is all that there is in the case concerning the pre
