She was convulsing
Nothing I wrote denies that possibility. I was merely pointing out that people passing out from shots of all kinds has been going on at about 1 per 30 people injected for decades, and occasionally there are more serious adverse reactions. Possibly this person had one such -- we don't know, certainly not from a phone video 50 feet away. Whatever happened, I do hope that she's okay. Some people die from adverse reactions to shots.
My point was simply that we shouldn't be shocked or surprised by adverse reactions to injections, whether fainting, or dying, or anything in between. It's happened for decades. Getting hysterical about it like on this thread is not helpful to the people involved, and only serves to make FR look foolish.