I don't know if it actually works or not, but you could try the Ding-Kinghttp://www.amazon.com/Ding-King-Dent-Repair-Kit/dp/B0007N56L8
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http://www.asseenontvguys.com/ding-king.aspxlolbillymays
Get a plunger.
I did. Get a plunger and use it manually suck the dent out
Today me and a bunch of friends were just hanging out bored. My loving idiot friend decided it was an OK idea to take a seat on the hood of my car. After multiple times telling him to get the forget off, I shot him with my airsoft gun. After feeling that he promptly got off. He thought the entire idea was harmless, nope. After he got up it revealed a baseball sized dent in the hood of my car. This understandably pissed me off. I told everyone to get the forget away from my car, peeled out of the parking lot, and drove around for awhile to blow off steam. Now I'm left with this dent which I have no clue how to deal with. I want to avoid taking it to a shop because that will cost enormous amounts of money. So I want to know if you guys know any quick fixes for this sort of thing. Fixes I've already tried are pushing on the underside of the hood to pop it out, and using a plunger to attempt to pop it.
http://www.youtube.com/watch?v=0JGXbIfeuRYBILLY MAYS HERE WITH THE DING KING!