Knee

Personally you think that kneeing is the best way to bust a guys balls and you think it'll be just the thing to break Ben's.

While Ben's still stunned you move one step closer before driving your knee up into his balls.

Ben immediately tries to bend over to defend his balls but you don't give him the chance. Directly after the first knee you feel his balls squish as you drive a second, even harder knee into his balls.

At this point Ben can barely stand on his own and is yours to finish, but how should you do it?