By Maane Khatchatourian
July 26, 2012 at 03:04 PM EDT

Zach Galifianakis and Jimmy Fallon swapped identities last night on Late Night With Jimmy Fallon, as Galifianakis acted as Late Night host for an interview with Fallon, who posed as Galifianakis. Confused much? Don’t worry, it’ll make more sense once you watch the clip.

The two funny men poked fun at the late-night talk-show tropes that characterize most interviews. The real Fallon commended the house band, the Roots, while the real Galifianakis asked the most cliché interview opener, ”How was your flight?” Fallon also praised the city where he shot his latest movie (Galifianakis’ The Campaign — in theaters Aug. 10), describing the people of New Orleans as friendly and its food as wonderful, prompting audience applause.

Before Fallon showed a clip from the film in which Galifianakis’ and Will Ferrell’s characters try to trash talk, Galifianakis made fun of himself by commenting on Fallon’s weight. ”I’ve noticed that you always gain weight for every role, but then you don’t lose it after,” he said. ”So you just keep getting fatter.”

Watch the clip below:

Read more:

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