Zach GalifianakisYou're on the press tour for your new movie. What's one way to guarantee you make a big splash very quickly? That's right, lighting up a joint, live on air.

Zach Galifianakis did just that on "Real Time With Bill Maher," making the complex political point that "it's only weed, dude."

Margaret Hoover, a somewhat more right-wing commentator, smelled the cigarette and confirmed that, yes, it was indeed the reefer. Keep reading to see the footage for yourself.