A cyborg comes into the classroom and...

the first thing that pops into my mind is the cyborg from the movie West World. The scary Yul Brunner robot that chases Richard Benjamin. So it would be weird to encounter such an android, because you wouldn't know what will happen. Is he going to be a good or bad robot, and what is his motives for coming in the room. He could just zapp you with his lazer gun or even worse, be like the Terminator

to where this evil droid is stalking you because you will bear the unborn child of a future leader that is meant to be destroyed. So alot of things will be racing your mind when a cyborg walks into a room.