You gotta love I eloquently they put this...it gets you excited!
"Energy can neither be created nor destroyed. It is stored in the form of potential. As the potential energy increases your heart surges, adrenaline rushes and your body braces in anticipation. The energy demands to be released. When you choose to release the potential, is now up to you."
...but you can release the same amount of energy with a good porn and a bottle of jergens....
....and a hell of allot cheaper!