Hey I'm searching a song, but i can just remember some parts of the videoclip

It's an animated clip where some guy is playing an extremly fast riff on the guitar. Suddenly he flies trough the air and kills some dragons with his guitar that shoots lasers or thunders or something fancy...:P

any ideas?
Sounds like the cartoon Metalocalyspe. I thinks the songs is called fight with your balls, or crush their balls. not quite sure.