Quote Originally Posted by jovo
...I removed the lensboard only to discover that the sheet of film from the previous exposure was still in the camera. Having been entirely unseated in the holder, it just fell out when I'd pulled the darkslide. Ever since, when loading holders, I run my finger along the darkslide slots to be sure the film's not in one of them, and I haven't made any mistakes in that area since...
I've had this happen at least once myself... It really tends to piss one off!