What is your all time favorite "and then they woke up" ending?

I always tear up at the end of Wizard of Oz.

The Newhart Show. In the final episode Bob wakes up next to Suzanne Pleshette from “The Bob Newhart Show” having dreamt living in an inn in Vermont. Amazingly funny.

[SPOILER ALLERT!]
Mirror Mask.

An Occurrence at Owl Creek Bridge by Ambrose Bierce. This story was also made into a short movie.

@wildpotato I have that in a Twilight Zone compilation. It is terrific!

The second story arc of Neil Gaiman’s Sandman has this kind of ending. The part that’s interesting about it, though, is that it’s a case where waking up in no way undermines the reality of the story.

“Open Your Eyes” (or “Vanilla Sky”)