Michael Cera was on Letterman last night promoting Youth in Revolt, but what he probably didn't realize was that Dave was feeling nostalgic for days when he'd eat his guests alive.

Last night's Late Show interview was a blast from the past with David Letterman shaming his guest like he hasn't since Crispen Glover tried to kick him in the face while on LSD. It was like a disappointed grandfather talking to the grandson that refused to try out for the football team.

[via Aol TV]