A passenger ran after a train as it was leaving a station. Two railroad employees boosted the passenger aboard, but as they did so a package carried by the passenger fell beneath the wheels of the train and exploded. The package, unbeknownst to the employees, contained fireworks. The force of that explosion caused a scale many feet away to topple over, injuring the plaintiff, Palsgraf. Palsgraf sued the railroad on negligence grounds.
a. Defend the railroad.
b. Decide. Explain.