If you watched the premier episode of Westworld on HBO last Sunday (second episode was last night just before the debate), you know what the entire episode features flies on the host's (robot) faces (well, about 4 or 5 scenes), and them not reacting to the flies at all. In a later scene we see a guest swat a fly. It's important, because the hosts cannot kill any living thing (the guests and the flies are the only living things in Westworld).
But the guy who runs Westworld (Anthony Hopkins) introduces reveries (a state of dreamy meditation or fanciful musing) into the robots. The reveries allow the robots to go beyond their core programming and recall memories from past experiences, and from observations of guests, to make them seem more human. It causes them, for example, to absentmindedly rub their lip, scratch an earlobe, mindlessly twirl their hair. They constantly see guests swatting flies, but that's an action they shouldn't be able to replicate, as it goes against their core code of not harming any living thing.
But this introduction of reveries accidentally creates a paradox, and that's what's causing the hosts to glitch. At the very end of the first episode, to reinforce how the paradox has caused them to glitch, Delores (the one in the gif below), after doing her "Ground Hog Day" thing for the umpteenth time, just hammers a fly that landed on her neck. And did it just like a human would have done it. Ruh, roh!
It's a hella-good show. It's the best kind of sci fi - It entertains you and makes you think. Westworld is a fascinating exploration of what it means to be human, and a thoughtful critique of violent entertainment (while also being violent entertainment) without bludgeoning you over the head with the differences between man and machine. And for all the violence in the premier episode, the most startling and unsettling is the swatting of that fly.
So just a week on the heels of the premier episode of Westworld, when the Internet sees a fly landing on Hillary's face and her remaining utterly unaware that a fly landed on her face, not react to it at all, nearly mirroring the scene in the show, the Internet rightfully and properly craps itself.