Did Tim Russert fart on national television?

Apparently, yesterday during Race for the White House With David Gregory on MSNBC, Tim Russert farted, rather loudly, on the air. The supposed 'fart' occurs about 14 seconds into the clip. And Best Week Ever swears that even though Russert’s fart was so awesome it sounds like a special effect of some sort, the audio in this clip was in no way edited or altered from what aired on TV.