The popular expression, "What happens in Vegas, stays in Vegas" conjures up a veritable jackpot of shed inhibitions, insane indulgence, and gleeful debauchery. And if you can remember any of it, you probably weren't there. But what would happen if a few crazy -- okay, hugely inebriated -- moments in Sin City not only didn't "stay" there but also followed you all the way back home and threatened to turn your life upside down? That's the setup that explodes into a series of outrageous consequences for two sexy, if wildly mismatched, strangers in the comedy "What Happens in Vegas."