Conan O'Brien Injured VIDEO

Tonight Show host Conan O'Brien was back to work on Monday night after suffering a concussion during the taping of a triathlon stunt with Teri Hatcher for his Friday night show. Part of the segment was taped outside of the studio, culminating with the pair running in swimwear through the audience back onto the stage, where O'Brien slipped on the floor and fell backwards, hitting his head.

Like any comedian worth his stripes, O'Brien turned the event into a comedic "cautionary tale" for kids.

Conan said, "As many of you may know, on this past Friday's show I was doing a stunt and I hit my head and suffered a slight concussion. And I promise, if you're a good audience, I'll do it again tonight."

View the video below.