As Sam goes to one end, Bugs blasts him in the face, and when Sam tries to return, Bugs outruns and blasts him again. Unfortunately, their fight is interrupted when Sam hears a train whistle seeing that it's 5:15 and tells Bugs that he's cutting the gunfight short so that he can catch and rob the train. Just as Sam hops aboard his horse and rides off after the train, Bugs follows on another horse. Sam orders Bugs at gunpoint to go back so he can rob it, but Bugs vows that he's going to save it. Right after Bugs hops aboard the engine's cab of the train (switching his cowboy hat with a train engineer's cap), Sam orders Bugs back at the count of five. Just as Sam reaches four, his horse makes him hit a telegraph pole. When Sam catches up again and tries counting to three, but when he gets to two, he runs into the wall of a tunnel. He catches up again and tries just counting two, but when he reaches two, he and his horse fall off a trestle bridge and into a river below. Sam, however, rides on ahead of Bugs and boards another locomotive to hit Bugs' green-painted 4-4-0 American type steam engine with a tender (#791). Thinking this will make Bugs stop, Sam calls out to Bugs to stop his train because he's got one of his own (a tender-less 4-2-0 red locomotive, #99), but Bugs calls out to Sam to stop his train. Both openly state that neither will stop their train unless the other stops his first. Thinking Bugs wants to play dirty, Sam tells Bugs they'll see who stops their train first when they crash and advances the regulator in his locomotive. Bugs accepts this duel and advances the regulator on his engine as well. As both trains rush towards each other head on, Sam keeps a stern face while Bugs remains calm. Almost to collision, Sam considers blowing his locomotive's whistle, but instead ducks down to wait for the crash. Bugs, however, extends the "legs" on the cars of his train so that Sam's passes harmlessly underneath. Just as Sam gets up and wonders why there was no crash, he spots a sign reading "End of Line" and his train falls off an unfinished trestle bridge and into a lake below. Bugs, in his engine's cab, then calls out a goodbye to Sam and drives off to St. Louis. The final shot shows Sam's locomotive, up to its smokestack in the lake.