So pretty much, I was busy shooting some frames of my friend and my roll was at it's end so I flipped down the rewind switch of my M7 but another one of my friends came up and distracted me for about 5 minutes. Then, I went back to my camera and took off the bottom plate and reached for the roll of film. It wouldn't budge. The back door flipped open and guess what...LUCKY ME, the film wasn't rewinded!. During the time I was talking with my friend and away from my camera, I had forgotten that I didn't wind the film back into the canister. Realizing my mistake, I panicked and closed the back door and bottom plate and rewound the film and took it out.
My question is: How many frames do you think I lost?