On "The Tonight Show," Fox News' Greg Gutfeld revealed the wild story Thursday behind his first encounter with fellow late-night host Jimmy Fallon years ago.

Gutfeld is a very funny man, and he’s also successful — which is why Fallon had him on. In fact, Gutfeld bears the moniker “king of late night” because his audience, on the conservative news channel Fox News, is higher than his competitors’. It’s a no-brainer for Fallon to host him, as a kind of friendly mutual promotion.