You'd be surprised. Anything that's "name followed by 'Industries'" is pretty illuminating.

[ Tony eyes her hand with interest as she flexes it, watching how it moves. It really is shockingly seamless, the way it can blend with human flesh. You wouldn't know. ]

But you just told me more about our giant robot pals in two sentences than I've gotten from several conversations with them. Can't say I actually know what energon is, though, unless it's just some silly alternate universe name for something I'm already familiar with.

If you tell me it's rocket fuel or something, I'm gonna be so disappointed.