The oddest thing happened to me in Tianamen Square in the mid 80's... I was taking pictures of the Mao photo over the gate and this Chinese guy walks up to me. He points at the camera and then to himself over and over and over. I tried to use sign language to show that it wasn't a Polaroid and I wouldn't be able to give him a copy. Finally I took his picture with the Mao painting in the background. He shook my hand and walked away.
For the life of me I still can't figure it out.