In his case, maybe both his forward momentum and exaggerated reach or leverage compensate for the power he loses for not being on the ground?
Geale KO was unreal and I haven´t seen anything like that before. Geale isn´t very heavy handed, but usually he has pop to keep his opponent honest.
Golovkin has a good chin. He took a shot well and landed one of his own (which Geale actually got up from). Not that big of a deal.