On Tuesday, August 9th, Comedy Central’s South Park celebrated 25 years with a rowdy concert at Red Rocks Amphitheatre in Colorado. The concert was headlined by alt-rock band Ween, who appeared in season two, and funk-metal band Primus, who famously wrote and recorded the theme song of the show.

It was only natural that Les Claypool and his band play said theme song, joined by South Park co-creators Trey Parker and Matt Stone. The duo also relayed the funny behind-the-scenes story of the song, as shown in the video below. (Revolver)

Photo Credit: Marv Watson