That's a good question. I've been discovering most of this by trial and error. Which is frustrating when I'm positive that I knew all of this by rote before!

[He paused for a breath and then added as an after thought:]

Yeah, I can do that one. It's your energy you're manipulating. I know that much at least...

[He really should talk to his god Gohan more. He could learn most of this more quickly but something about that just didn't feel right.]