I opened the lid of my film tank...no, really, I did
I was poring the Caffenol developer through a filter tissue directly to the tank. Then I decided to lift the lid and see if it was going well. LOL, I did it. I admit. Too good that I didn't discard the film immediately - it happens to be quite funky and interesting in places. I think its low speed saved it, and the dim light in the darkroom too.