Actor Jason Segel, who is known for his roles in I Love You Man, Forgetting Sarah Marshall and of course, Freaks and Geeks popped up on stage at The Wiltern in Los Angeles during the week to perform his own original song.
According to the Youtube video description:
The band was at a restaurant in Los Angeles; drinking tea, when they were offered a bottle of wine by two celebrities. Paul Rudd and Jason Segel. Now The Swell Season has been enjoying watching their “Freaks & Geeks” DVDs while on tour, so this was a nice coincidence. They became good acquaintances, so The Swell Season asked Jason Segel to be a surprise guest and sing a song.