I would chose someone who could give me a challenge. That'd probably be Chuck Norris or God.
I'd pull on Chuckie's beard hairs and tear them out at a medium pace. (It'd sound like velcro.)
For God, I'd go to heaven and grab snatch the harp from Michael, run towards God's throne and jump on top and throw the harp down, violently, and yell, TOUCH DOWN!