We're guessing that Howie Mandel doesn't throw a lot of crazy ragers at his mansion in Calabasas.

Last night Mandel hosted a Fourth of July bash, and around 1 am he walked by his bathroom and heard a couple having sex, according to TMZ. It's not clear why, but Mandel was worried that a sexual assault could be taking place. He played it safe and dialed 9-1-1.

Police came over to investigate the bathroom sexing. It turns out—surprise, surprise—that the 21-year-old man and woman had just a few too many drinks and gotten carried away.

We're guessing Mandel won't want to go in that bathroom for a while until it's been properly scrubbed down.