Watch: Mark Schools Conan in the Art of Epic Voice-Overs

In late July, Conan took a playful jab at ET host Mark Steines' somewhat over-the-top voice-over stylings, and in the weeks since, the gag has become such a hit he was invited to the show to teach Mr. O'Brien a thing or two.

The "Entertainment Tonight" host paid a visit to the late night funnyman on Monday and from the looks of it, Conan has got his work cut out for him if he intends to make it as an ET correspondent.

Watch the clip to see Mark skill Conan in the art of epic "Entertainment Tonight" voice-overs.

"Conan" airs weeknights on TBS.