But his favorite live memory was even more Spinal Tap - as it involved a guest appearance from Tap bassist Derek Smalls. Trohman tells Musicradar: "We're all huge Spinal Tap fans. When we played Conan O'Brien's TV show last year, we decided to do our own Spinal Tap thing. We worked it out with their people that we were going to pay homage to the Derek Smalls scene from the film in which the bassist, who was played by Harry Shearer, got stuck in his pod.

"We had pods built, and we even got in contact with Harry and asked him if he wanted to be part of it. Luckily for us, he was super into it. We came out of our pods and started playing, only of course the pod that Pete Wentz was in, because he's the bassist, wouldn't open. But there was Harry Shearer to the rescue - he came out and started playing.