Some of you might be asking, yeah, Richard Simmons is going to be on The Late Show With David Letterman tonight, so what? Well, you didn't see what happened on the show six years ago.

The diet and exercise maven was on Letterman's show around Thanksgiving, and he was dressed as a turkey, basically acting like Richard Simmons always acts, only this time dressed as poultry. Well, his antics really got to Dave this time and Letterman kinda blew up at him (I think Simmons might have grabbed Dave or hurt his back somehow), shooting him with a fire extinguisher several times and telling him to get the f**k out several times (CBS bleeped the words, of course). Dave has talked about the incident many times since then, and has even showed the clip several times. Tonight, Simmons returns to the show for the first time since the incident. I wonder what they'll talk about? (The pic on the right is from a different Simmons appearance on the show.)

On a related note, if you'd like to hear Simmons swear, check out this video.