Last night, late night was comedic gold. Anderson Cooper addressed his two giggle attacks — "I'm so stupid for giggling like a 12-year-old girl meeting Justin Bieber for the first time" — and then proceeded to giggle during an absurd game of Russian roulette roshambo with Jimmy Fallon. You just didn't know if pie would get hurled in the loser's face. Plus: Tracy Morgan was belly-achingly cheeky. He confessed to a threesome with O.J. Simpson that resulted in the birth of Khloe Kardashian; flaunted the swashbuckling moves that prove he's related to Clark Gable; then suggested a teardrop tattoo for President Obama for being such a badass. Also, Will Smith attempted to teach David Letterman how to dance, and after (unsurprisingly) failing, broke out the striped green socks that matched Letterman's tie, and called out the talk show host for having slept through his movie five years ago. And on the Tonight Show, Josh Brolin recounted a prank that had him banging angrily on Men in Black 3 co-star Will Smith's trailer. Watch our compilation to see what you missed.