'Hangover II' star Zach Galifianakis puts Will Ferrell 'Between Two Ferns'

It's been a while since we last got a new episode of Zach Galifianakis' Funny or Die series, "Between Two Ferns with Zach Galifianakis." Then again, it was going to be pretty hard to top Jennifer Aniston sharing a stage with Tila Tequila.

Just in time to promote his new movie, "Hangover II," Galifianakis has a new, awkward interview with Will Ferrell. Jon Hamm also makes an appearance -- because what else is he supposed to do during the extended "Mad Men" hiatus? -- and a little kid comes on just to remind Zach that he's fat.

And be warned, they slip some graphic zoo footage slipped in there.