The Devil Kidnaps Mugman

After getting zapped by his own pitchfork, The Devil snaps and declares that since Cuphead took something of great value to him, he'll do the same to him. Cuphead retorts that the Devil has nothing he cares about worth taking, but when he turns around, Mugman is taken by the Devil, ending the episode on a dark note, compared to Season 1's finale.

Example of:
Downer Ending