[The knife goes whizzing out of Michael's hand a split second after the gun fired, and for a brief moment he looks absolutely stunned, like he didn't expect that Tieria would really pull the trigger.
It doesn't last long. Long enough for Neil to react while Michael is caught off-guard, but not enough for anyone to get a good impression of the look on the pseudo-Innovade's face to blackmail him with later. Surprise becomes anger all too quickly and he draws his fist back--if he can't cut Neil a new one, he can still beat the shit out of him with his bare hands, unless Tieria intends to shoot his hands off too.]