Your film misadventure made me think of a feature of Exakta cameras, the built-in film cutter.
You unscrew a small knob on the bottom and pull down a sharp hook to separate the exposed film from the cartridge.
Done in the darkroom, you could start development on a partial roll, while quickly re-threading the rest of the roll.
New users often discovered it when wondering , "What's this?".
Made for a MUCH MORE frugal world.