Was also seeing Metalocalypse. It's a parody / tribute tv show for rock music / hard rock bands and fans. Lots of famous bands and rock history events throughout the show. Liek this one

https://youtube.com/watch?v=Nztp7NBujaE

It's just a Van Halen/David Lee Roth reference. The show definitely gets better in the later seasons. If you like Scandinavian rock, Slayer, 80s rock bands, or Death metal music in general, you'll like this show.