Maynard James Keenan is a man who wears many hats, but in 'Crank: High Voltage,' he wears an incredibly nerdy wig. The Tool / A Perfect Circle / Puscifer singer has made various appearances in both television and film during the past 15 years, but his cameo in 'Crank' is one you may have missed.

It's interesting to see a musician of Keenan's caliber play such a small and informal role, but for fans, the surprise of recognizing one of their favorite musicians is welcomed indulgence. Starring Jason Statham, 'Crank' follows a man with a battery-powered heart who needs to constantly recharge his ticker. Keenan plays a dorky young man whose dog has an electric collar. Of course, Statham snatches the collar and demands that Keenan shock him in an hilarious scene.