@ImportantNobodyConsidering Rakkan reacted to getting shot with shrieks rather than falling over, in addition to Donny having previously experienced facing a speedy supernatural opponent that could survive not only a bullet to the chest, but a grenade detonating at point blank range (his match with Gweyr here:
http://www.roleplayerguild.com/topics/93671-pistol-grip-pump-gweyr-vs-donny/ic), he probably has more of an inclination to quickly assess the situation than Rakkan does. Rakkan wasn't at all expecting to be shot, whilst Donny being the savvy tactician that he is had already planned ahead. He performs his turning shot to not only conceal his weapon, but allow himself to already be in a position to flee the scene of a crime or in this case, an enemy that won't go down easily.
But, Donny is only /trying/ to lunge away, making an attempt. Let's say in this scenario that he's not quite fast enough to do so. I mean, Xenomorphs are fast as shit.
How about Donny doesn't have time to escape Rakkan's reach but manages to shoot the arm that is grabbing at his throat before the gun gets snatched away? Donny loses his best weapon and the element of surprise, and Rakkan loses the use of his right hand.
I just now edited my last post to accommodate for that possibility.
