Well yes she would be animated enough to bounce LF.
However I believe that some who have mentioned it are noting that with her upper torso quickly turned to the left as in the last panel it would be her left breast to ride high and not the right - basic big boob physics. (it has to do with how breasts are attached to the ribs)
I actually like your elevator scenes and have noted that you do have several events taking place in them over the run of the comic - both in the old version and new reworked comic. My favorite was her early explosive departure by flying up the shaft all those years ago. (one of your best action sequences in my mind)