Invasion of the Bunny Snatcher

After Bugs runs off screaming in terror after encountering his own doppelganger, the "That's All Folks!" card pops up, complete with the ending music...before Bugs appears in front of it as he didn't think the cartoon should end like that before the cartoon continues and he investigates where the doppelgangers came from.

Example of:
Fake-Out Fade-Out