Friday the 13th came on Sunday for me today. Here’s what I did. I was trying to finish a roll of b&w in an Olympus OM-1 today. i thought (?) it was a 36 so when it stopped advancing at 30 I stupidly tried to force it. Then I turned the camera to R and started to rewind it. Rewinding felt funny, when it wouldn’t rewind I (2nd stupid) thought it was rewound and opened the back. Oh oh. You are right. When I tried to force the film to advance it tightened it too much and the rewind clutch wouldn’t release. So now I have a test roll. Stupid rookie mistake. Fortunately it doesn’t appear that I damaged the lovely little camera. I will take my punishment. Lol. I guess I am so used to the F4’s I use all the time I have forgotten how to rewind film manually.