Van Halen was at 30 Rock the week his then-wife Valerie Bertinelli hosted Saturday Night Live in February 1987. So then-SNL music director and guitarist G.E. Smith invited Van Halen to jam on-air with the band and perform a song that they composed on the spot. "He doesn’t want to follow his wife around like a puppy dog," Smith remembered in an interview years ago. "So he finds out about the music office, and he comes in and hangs out — because you can do whatever you want in the music office. We're in there drinking, smoking, whatever. He was comfortable there. It was his people, band guys. He got that. He could relax." ALSO: Watch Van Halen's Two and a Half Men cameo from 2009.