The Answer is, place your camera in a light seal bag and take the film out of the camera and put it in the canister and send it to the lab, make sure the film canister is all black, not transparent canisters from Fujifilm or Kodak where light can pass through it. If you don’t have a black cloth bag to unload the film, you can put the camera underneath your quilt and perform the same steps to avoid light exposure on the film. Do not apply force when you rewind the film, the process should be smooth and easy, whenever in doubt and you want to save your precious photos, bring it to a dark area and unload it. Bring it to your nearest film processing lab and they will have the dark cloth bag to unload it.