Peter approves very much of this guy's desire to keep the spectators from getting caught up in like, fireballs or whatever. He already likes Gokudera, even if he is probably going to blow his arms off.

"Oh man, that's so cool. You're gonna have to tell me how all that stuff works later," because he is a giant nerd and he wants to know how all the stuff works. "Anyway, I'm gonna try to punch you now."

Maybe he shouldn't like, announce what he's going to do, but hey, he's new to this kind of fight. So, Peter starts charging Gokudera, that's a thing.