Do a hanging wedgie in your tiniest panties. Make sure you have something BIG up your ass, and keep the wedgie for as long as it's needed for the panties to rip. I'd take something to eat and to watch up there
If anyone comes in while you're hanging, they can (and SHOULD) spank you as hard as they can, so to let them know, write with a marker SPANK ME in big letters on your ass, making sure it shows.