The last Calvin and Hobbes strip [1].

1: https://www.reddit.com/r/calvinandhobbes/comments/6pig9h/hon...

Sometimes I entertain the fantasy that Watterson continued writing Calvin and Hobbes as a hobby-- whenever a particularly good idea came to him he'd put it to paper. And someday he'll drop a collection that dwarfs the original strip.

Still brings a lump to my throat.