Wallach was almost poisoned during filming when he accidentally drank from a bottle of acid that a film technician had set next to his soda bottle. Wallach mentioned this in his autobiography[9] and complained that while Leone was a brilliant director, he was very lax about ensuring the safety of his actors during dangerous scenes.[8] Wallach was endangered in another scene, where he was to be hanged after a pistol was shot and the horse underneath him was to run away in fright. While the rope around Wallach's neck was severed, the horse was frightened a little too well. The horse rode off for about a mile with Wallach still on top of the horse and his hands bound behind his back.[8] The third time Wallach's life was threatened was during the scene where he and Mario Brega jump out of a moving train. The jumping part was fine, but Wallach's life was endangered when his character attempts to sever the chain binding him to the (now dead) henchman. Tuco places the body on the railroad tracks, making the train roll over the chain to sever it. Wallach and presumably, the entire film crew were not aware of the heavy iron steps that jutted one foot out of every box car. If Wallach had stood up from his prone position at the wrong time, one of the jutting steps could have decapitated him.[8]