The way it plays out, eventually, Kirk seems to be outside simply to retreive Spock's body, rather than to be in hot pursuit of him. In fact, it's not clear to me, watching this, that Kirk even has a thruster pack on. I love how in the extended version, Paramount in its wisdom, decided to restore the deleted thruster suit sequence and reveal to us all the scaffolding supporting the partially completed Saucer Section Setpiece. I mean, just how brilliant do you have to be? That one shot is like a turd in a punchbowl and they had to know what they were doing, even including that ... no one could've "missed" it, it's far too blatant.