I was at a metro stop in Chicago once, when a young looking guy and a group of people walked up to me and started haggling me. I asked for a cigarette, and the main guy in the group gave me one. I smoked it, and when I was done he started haggling me to eat the cigarette butt. I didn't give in, and then they walked away. About 30 minutes later, I saw the guy again, and said hi. He said he had to go, then jumped into a shadow and disappeared. I have no idea who he was, or where he went. He just jumped into a shadow and disappeared. I wonder to this day as to whether he was a ghost, a demon, or a hallucination. If he was a hallucination, the question of did I smoke a cigarette or not, as it was a very real experience.