After each chat segment, James Corden makes a point to let his guests know they're always welcome back to The Late Late Show. He means they're welcome to come back on as booked guests.
However, when Zach Galifianakis last appeared on the show, he took James' offer at face value. Now Zach is always hanging out at the late night show's offices. They can't seem to get ride of him and it's becoming a real problem.
Watch Zach explain what happened when he began crying in front of 500 people:
Watch The Late Late Show weeknights at 12:37am/11:37pm c on CBS and stream full episodes on CBS All Access.