UCB is also known for its celebrity drop-ins.

We convinced Brooke Shields to come on and play Brooke Shields, Paul Scheer says.

It was one of the highlights to have Brooke Shields [there] at three in the morning.

3waydel

Credit: Hutton Supancic/Getty Images; Angela Weiss/Getty Images; Art Streiber/NBC/NBCU Photo Bank/Getty Images

Robin Williams showed up to do an Improv Jam and it was amazing, Colton Dunn remembers.

Worst suggestion you’ve got the option to get as an improviser is proctologist, St Clair says.

Other contenders: cream corn, dildo, and sperm.