-
1). I think the video footage shows her collapse and be dragged into the waiting vehicle. Look at her feet in the video. Perhaps she fainted due to exhaustion and pneumonia. It looks disturbing.
2). They clearly tried to prevent disclosure of her pneumonia, and changed the story for the reason she left the 9/11 event. That suggests to me they are trying to hide something deeper.
3). It seems quite clear that her personal doctor attended the event with her and asked her to squeeze her finger. This is apparently a test for a neurological condition.
4). Trump has been raising speculation about her health for ages. I think it is likely that he had some intel about a probable health condition, and wanted to fan the flames. Having laid the ground work he is now getting his reward. Grim but sadly effective.
Whatever the truth, it is a perfect storm for Clinton. She is already seen as hugely untrustworthy - many are unlikely to believe her statement of a clean bill of health.
Pneumonia is already pretty serious, or can be, and Clinton's no spring chicken. 30k people die from it every year in the UK. Why do you think it's something else?