Punching? He's got this, and throws a punch at the empty air, pretty sure that 'thumb outside the fingers' is the main part of getting it right.

If he were his aged-up self, it would be a pretty embarrassing show - guard down, all swing from the shoulders and careless elbows, cocky with years of being one of the taller, stronger kids in any age-grouped crowd who usually has backup not far off. But at 17, he's pretty sure punching isn't more complicated than that.