It’s pretty self-explanatory. I didn’t invent this one though. My friend Phil Matza who operates the Arpema School in Bourg de Peage, France sent this to me.
There’s a new version in the works too: “Ultra-GuitarHero” model has an extra knob marked “asshole” Funny though. If you turn up the beer knob, the asshole knob goes up automatically!