So I was in the shower today...

[Zack]

And as soon as a particle's energy is released, it is no longer available in the same form to be moved.

Uhmmmm.... Kay.

He's right, in a sense. Since matter is just dense energy, if a particle releases ALL it's energy, it no longer exists because it was changed into energy. That's why when you have an antimatter annhilation there's a tremendous burst of energy and the two particlees you annihilated disappear; the energy is the energy that was once the matter making up the two particles, but because they touched each other and canceled out, they turned back into their pure energy form (which proceeded to spew itself all over the place).

Just imagine what would happen if we could harness matter/antimatter annihilation, or even fusion. Hey, they do it on Star Trek!