Before the collapse it looked like she was already out of it
It looked like she was propped up against the bollard before she was dragged into the van, but I’m not sure. She looked really out of it at that point.
Below is a link to a clip of that slow, pained walk down by Hillary a NYC street a couple of months ago. Her every so forced smile and fake hand waving at nobody no longer work. The politician by her side is Al Sharpton. Ever present is the big black man who seems to have the tools to keep her going and rest of the large entourage of caregivers. All in all, a painful scene to watch. It seems it was painful for all around her, too. She is led off to their left, perhaps to a cross street, perhaps because the little walking she did was all the energy she could muster.
https://www.youtube.com/watch?v=oN8fA6o86P0