[quote=So Boerd]
But it's wrong. And now you're copping an attitude at me while having no idea what you're talking about. Kilogram, the unit, is a measurement of mass, itself being the quantity of inertia possessed by an object. You are converting two such kilograms to energy, hence two times the speed of light squared.
[/quote]

It's almost like he doesn't realize he's being trolled...