So there I am, striding around town with my Optimus Prime helmet on, when I see my old gym teacher. Never what you might call friends, he and I. So, feeling brave, I go up to him and roar - my voice is totally transformed - not only do I look like the leader of the Autobots, but I sound like him too. Anyway, I look up at the little worm who made my life a misery at High School, and I thunder: "Mr Skinner, you will PAY for the sins you have visited upon the weedy and the un-jock-like." And then it kinda falls apart, because when I try to lift him up by the throat, I just can't.
So there you have it. The Optimus Prime Voice Changer Helmet. It does great things for your voice, but you can forget about invincibility, or turning into a truck. Coming soon from Hasbro, to a comic shop near you, but no price as yet. Who cares? We want.
Optimus Prime Speaketh [Ubergizmo]