[Blue Jays]

One would think her handlers would teach her how NOT to make those bizarre and inauthentic facial expressions.

[Bon mots]

One would think her handlers would teach her how NOT to make those bizarre and inauthentic facial expressions.

She can't help it.

It's a symptom of Parkinson's Disease.

VIDEO

[GreenHornet]

One would think her handlers would teach her how NOT to make those bizarre and inauthentic facial expressions.

I know that some people have attributed this to seizures, but I have a different theory. I think the key word in your statement is "inauthentic." Hillary is not a very warm person, and does not have much of a sense of humor. Consequently, when she attempts joke around or look like she's having fun, it's obvious that her facial expressions and body language are not genuine. As a result, it ends up looking bizarre instead.