Sir Paul McCartney was on Late Night With Jimmy Fallon last night, and he did a pretty solid job of going full-on goofy with a silly sketch and the proclamations that he invented both the selfie and the photo-bomb. (Do you think he knew what either term meant before his segment? Debatable.) What he did not do a very good job of, though, was imitating an American accent in a bit where he and Jimmy Freaky Friday–ed each other's voices. We all have our gifts, Paul. Don't feel too bad.