In case you were wondering, Amy Schumer, Judd Apatow, Dave Attell, Colin Quinn, Vanessa Bayer and Mike Birbiglia are having plenty of fun on The Trainwreck Comedy Tour. 

For instance, a fan left a copy of Judd Apatow’s new book Sick In The Head on stage with a message inside requesting that he graciously autograph the book. However, the book was discovered while Mike Birbiglia was on stage and Mike, for a funny moment, gave a surprising reaction. It was the sort of surprise that Apatow felt needed a revenge.

Watch the whole sequence of events transpire here, then watch more road footage of the Trainwreck tour here.