I opened up a Yashica YF once while in the car to change film, and the little film loading diagram came fluttering out of it. I just saw it out of the corner of my eye, not sure of where it went. I searched for half an hour, checked my jacket pocket, looked around the outside of the vehicle, and checked it again when I got home and was able to acquire one of my brightest flashlights. Looked at both seats, behind and under, and even in the part where the back meets the bottom. Nothing! Well, not exactly, I did find three nickles and a dime.
So the diagram was likely still in the vehicle when I traded it in some years later. Someone will probably find it and demand that their mechanic put it back where it belongs.
PF