The happened when I was in college, this was a primarily Indian college. It was a Friday evening and a couple of friends and me were going to join others from the college, at the river partying. I don't remember why we hadn't gone with the main group but it must have been about 10pm or later and already dark. We lived on the ground floor, which was actually a little below ground. Our windows were ground level. While in one of the double rooms with a couple of the guys, telling them to hurry up or everyone would be drunk before we got there, we heard someone knocking on the window of the room. It was one of our friends who was supposed to be at the party looking totally sober, which was unusual for him.
We knew that he was one of the ones to go get the liquor and beer and thus one of the first ones out there and we were sure he started the celebration as soon as his feet hit the ground and wouldn't stop until he hit "coma".
He motioned us next door to the windows in the common bathroom so we went over there. When we got there he asked us to follow him out the windows to go to the party. Normally that would have been normal that is if it had of been after hours. Those bathroom windows were the best exit and entrance points for the dorm for after hours. If you didn't sign out for the night by a certain time you came and went from the window or if you were sneaking girls into your room or back out this was where you wanted to do it because they were the largest windows on that floor and like I said ground level.
As he urgently motioned for us to follow him we just kind of looked at each other and shrugged because it was still early enough to just walk out the front doors and not go wriggling out any windows. We told him we'd be right out and then went up to the next floor and out the doors. We couldn't find him and gave up after just a minute and went on to the party spot at the river. We figured he had went on over to the girls dorms.
When we got to the party, there was a big bon fire and there he was sitting beside it in the middle of everyone as drunk as a skunk. We asked how he got back so fast and before us yet appeared sober while at the dorms a couple of minutes ago. Everyone around him asked what we were talking about because he had been there all evening. Everyone we asked said the same thing, he'd never left. The other guys and I knew we had seen and spoken with what we thought was him but it wasn't.
That was freaky. I've never figured out what happened.