Appearing on a new episode of Netflix’s The Joel McHale Show, actress Kristen Bell related a totally gross but seriously funny story about how she and her daughter got anal worms.

She goes into gruesome detail about how kids tend to not experience symptoms and how she learned that her kids had been exposed to the pinworms (another word for anal worms) after discovering that their preschool carpet had been removed.

Worst of all is how she discovered the infestation.

Check it out below (but make sure you’re not eating):