Attention Iron Horse number 2, in case you haven't heard some lucky varmint managed to make off with the Clockwerk Lung in Iron Horse 1! All the guards on duty have been punished according to the lumberjack code, don't let the same thing happen to you all. You boys have done some real good work lately and I'd hate to have to put you out on disability.
― Jean Bison to his men in Iron Horse number 2 via PA[src]
Sly hops onto the roof of Ponderosa Cabin and spots the train quickly making it's way through town. Bentley is not so sure he will be able to hop aboard in time, but for Sly, there is more than one way to get onto the caboose.
Sly jumps on top of the train and enters the caboose. He goes through a series of traps such as guards, flashlights and lasers. Meanwhile, Bison comes on the P.A system to warn his men about the theft of the other lung in Iron Horse 1, and the consequences for failing to protect this one. Sly finally reaches the Clockwerk lung, and grabs it. Now all that's left is the Clockwerk stomach.