The two of them riffed for a while about the pure absurdity of a legendary musician writing music for a video game. McCartney describes how he first encountered video games--'I'd see my grandkids playing them"--and began playing, and soon enough 'I was Mr. Cool" (and not cool because, you know, he's a Beatle.

Then the two get into an extended riff on the idea that McCartney would rather be making this guest appearance on Ellen. 'No, no, I'm really happy to be here," the rocker claimed, sticking his tounge into his cheek in a gesture of disdain.