Funniest kill: broke so-and-so's "unshakeable will" with Vicious Mockery. just... imagine surviving 9x greatsword attacks from a githyanki. a sneak attack coming out of nowhere. Then some guy with a flute calls you a twerp and that's it, you're f'ing done.
I don't need to imagine, I'm grinning because there was a DnD skit that did exactly what you just described:
Blood tears and all 8'D "You just insulted a grown man to death."