Not a bad superpower though.
One of my friends wound up shooting his own butthole off (long story)... But for a few years he had to wear a colostomy bag (I take it it takes quite a while to grow a new butthole)... Anyway, you sure as hell didn't want to piss the boy off. He'd haul up that bag and play it like a bagpipe. I have personally seen him shut down bar fights and clear the place in seconds.
