I went to a festival at the weekend and when used a disposable camera. I had used all but one of the photos so i took a picture of the floor just to use it up, I then went to wind it to the end but it wouldn't stop. the advance wheel keeps winding around and I can also click the button to take photos still. I am so worried that I wont be able to get it developed - this was the only camera I had! Anyone know what might have happened here?