From the new rock and roll parody “Walk Hard.” I’ll tell you exactly how the casting for this scene went down. Judd Apatow went and got three of his buddies — Paul Rudd, Justin Long, and Jason Schwartzman — all of whom are capable of sterling over-the-top Beatles impersonations, and then tossed Jack Black in there just to get him into the mix. Except Black is 35 lbs. heavier than Paul was on his worst day and can’t muster more than the barest trace of a Liverpudlian accent. Which becomes part of the joke. It’s Jack Black! Who looks and sounds nothing like Paul McCartney, as Paul McCartney!

The result: Very possibly the first comic scene Black’s ever been in where he’s the weak link.