So I'm Dungeon Master for a D&D group now. (Some people wanted to join, so our old DM lead their group, and I, having conveniently and spectacularly died, DM'd our old group.)

Our bard summoned a cello above a paladin. The paladin succeeded in his reflex save, and the cello slammed into the cold hard floor of the temple, shattering. The party proceeds to blow up the temple.

Five minutes later, all action halts as we all realize that none of us made a "drop the bass" joke.