Some weeks ago I was processing two films that I had just shot. I have been a bit busy lately, with little time to photograph, so I hadn't used my processing equipment in some time.
I loaded the film in the spools, closed them inside the tank, prepared the chemicals, checked my watch, and opened the tank to pour in the developer.
At this point, I remember thinking "funny, I didn't remember that you could actually see the spools and the film at this stage". Suddenly I felt a rush of panic running down my spine.
Yes, I had actually opened the film tank instead of opening just the little rubber lid that lets you pour the chemicals in, thus ruining two whole rolls of film.
I did try to process them anyway, changing the times accordingly, but of course to no use - all pictures were now blank...
Oh well.