I must pay more attention to how I load the film in my cameras!
When I pulled this film out of the camera, it was wound around the take-up spool the wrong way. So, I knew something was wrong and it would almost certainly be unexposed. But I went ahead and developed it anyway. I should have just rewound and reloaded it instead. Oh well.
Then I thought, how on earth did I do this? So I tried, deliberately, to do it again. It took me four tries before I could reproduce the mistake. How on earth I did it in the first place is a complete mystery. :D :D