You were hanging out with Xander at his house. He was rambling on about some science thing while you were trying to listen but you were already starting to drift off into space, it was fairly late and I suppose he was giving you an example with something that had to do with electricity, he plugged it into the wall and the lights one by one started to turn off. He had made the entire neighborhood lose power..

“oops, I guess I got the voltage wrong? That’s odd, it seems I was nervous around you.” he looks at you. “you seem startled, why?”