Make up a 50-word joke with three words: train, slippers and watch.

A train is running at a constant speed. A 2b man, wearing a pair of flip-flops, looked at his watch with his head down and walked towards the trunk interface. Suddenly, the train swayed from side to side after crossing the track, and the 2b man "except" ran to the toilet door. Look at it, it's really absent-minded. The people next to the stars are laughing stiffly, as if they had eaten Rhizoma Coptidis.