A doctor's thoughts on Hillary's behavior
Video here. I found it quite impressive. If you're in a hurry, skip ahead to about 6:00, where the really interesting material begins.
UPDATE: via the UK's Daily Mail, here's a closeup of Hillary's "stumble" on 9/11. It looks like anything but a simple stumble. An aide stands to her left, with a good grip on her arm, as if expecting something to happen. First her back arches repeatedly, as if going into some manner of seizure. Then two other aides grabs her torso and her other arm and the three try to move her forward. Then she goes limp and flops down.
UPDATE: here's more from the same doctor, regarding her 9/11 episode. He points out that, on overcast day, she was wearing sunglasses, in a strange blue shade that I've never seen before, and he says that such glasses are used by Parkinson's patients to suppress muscle dis-coordination. I checked, he's right, here's a webpage selling them for just that purpose, and in the same bright blue shade as the glass she was wearing.
And while we're on glasses, let's talk prism glasses, such as such as Hillary wore a while back. While they can be necessary after a concussion causes double vision, they're also used for some Parkinson's patients.
FURTHER UPDATE: This page asks what is going on with Hillary's eyes during a recent speech. I couldn't see it in the video, but when I viewed it frame by frame it was apparent. Often one eye will be looking more or less straight ahead, and the other be set at an extreme left or right position.
It happens when she swings her head. One eye seems to find its new target, while the other eye lags behind and takes a while to catch up. It turns out this, too, is a symptom of Parkinson's. "In Parkinson's disease, the saccades [eye movements to aim at a new target] tend to be slow (or hypometric) and show delayed initiation. Some people with PD require a blink to change their saccadic position (this is called Wilson's sign)."