I was just thinking what Karen said. Maybe it was at the end of the roll. Once that happens, it immediately rewinds itself to the very beginning. That happened to me once when I had my Canon Sure Shot. It was actually in the middle of a roll. My Dad, a photographer, told me to go into the bathroom or a dark closet and rewind the film from the camera and put it into a film container. This saved whatever pictures I had already taken.