So recently I got my aunt's old Pentax Spotmatic. I started shooting straight away. I've got a 36-photo-film in there, and now, at photo 29, the film got somehow... stuck. I can't pull the handle that transports it any more. Also, the little red window above the handle shows a red dot. I don't have a manual, and the ones I found online didn't seem to explain what could be the problem. So, has anyone got any ideas? And is there a way to get the film out in my situation without destroying the photos?