A train stopped at the defendant’s railroad platform. As it started up again, a man carrying a small package jumped aboard. He appeared unsteady and about to fall. Therefore a guard on the train, holding the door open, reached out to help him. Another guard, standing on the platform, pushed the man from behind. The man made it onto the train, but he dropped the package, which was about fifteen inches long. The package was wrapped in newspaper and contained fireworks that exploded when the package hit the rails. The shock of the explosion caused several scales at the other end of the platform, many feet away, to fall down. As they fell, they struck the plaintiff, injuring her. She sued the railroad, claiming the guards were negligent. Is the railroad liable? (Palsgraf v. Long Island Railroad Company, 162 N.E. 99, N.Y.)