I was a Cleric of the God of Humor. As part of the Humor domain, I was granted a special Cantrip, which in the 2e/3e style was a Reversable spell like Light/Darkness or Flesh to Stone/Stone to Flesh.
The spell was "Pants Fall Down" and it did just that. If the target failed a dex save (and they were wearing pants), their pants fell down around their ankles, slowing or possibly tripping them, and socially embarrassing them.
When cast in reverse it was "Pants Fall UP". If your pants were around your ankles, this instantly put you pants on you correctly.
IF, however, you were ALREADY WEARING your pants correctly, it gave you a massive wedgie, dealing 1d4 damage and a con save to avoid being sickened for a round.
Villain is monologuing "Pants fall UP!" Villain is no longer monologuing.