Margo will (probably) not move, but come on, like Bobbie could ever take a nice, clean shot with her hand bobbling all around like that! I'm going to put up a reader poll posthaste. Who, or what, will Bobbie shoot? My guess: the staircase, or maybe a wall.
In all this mayhem, there is a clear cry coming from the people, and that cry is: where is Taser Lady? And where is Ruby and her bucket of suds? Where are the other members of Margo's impromptu criming-fighting club when one of their own is at risk? I suppose they're "at their own apartment building" or some such, but their extrasensory perception for danger must be pulsing in their temples by now! Ruby is probably just whipping up a fresh batch of hot water and palmolive.