Marc Summers made his name as the host of the Nickelodeon classic "Double Dare," one of the most beloved -- and MESSIEST -- game shows of all time. (Slime, anyone?)
But here's what nobody knew at the time: Marc was grappling with OCD -- and didn't even realize it.
That's just one of the many personal details Marc delves into in his documentary, "On Your Marc," which looks back at his long career as the host of Nick's "DD" and "What Would You Do?", and Food Network's "Unwrapped."
But the doc discusses something else, too: the process behind prepping for his latest gig -- a one-man show!
"Who knew?" Rach asks, marveling at her busy friend of nearly 19 years.
If you haven't seen the doc yet -- which was released in October 2017 and features commentary from friends like Neil Patrick Harris -- what are you waiting for?! Get a preview in the video above!