Peter looks at the mini dynamite briefly before tossing it over his shoulder. He's 50/50 on whether he thinks it's an actual explosive or not, but just in case he figures it's best not to hold onto it. Besides, whatever Gokudera's doing right now is way more interesting, and Peter definitely lets himself get distracted by it.

Buut then he realizes that this dude can summon a whole-ass canon out of flames aaaand now he's starting to think that maybe standing in one spot isn't the best strategy. He slowly starts to circle Gokudera, just watching for a moment to see what this thing can do. Though if that dynamite he'd tossed over his shoulder decides to explode, things might not be super great for Peter in a few seconds.