Well I did a shoot once for a charity, it was all a colour neg, I was flying off on holiday the next day, so I left the 5 rolls of film with them with strict instructions on what lab they were to use, that I must get the negs back etc...
Of course they went to wonder snaps or something. I actually got all the film back and to my amazement the cheapie processing was fine bar one roll, it had about 6 frames on it then went blank. I thought I'd used every frame on every 36 exposure roll. I have no idea what happened to it, Oh the markings were there so it wasn't the processing. It really spooked me for quite a while, it's the not knowing what the hell you did, or what strange thing happened to the camera for all those frames.
I love modafoto's story, that mad me laugth.