I loaded Little Guinness with Fuji Acros 100 for the EAA Fly-in. I thought it's famous lack of reciprocity failure might result in reasonable exposure times inside the vendor hangars. Turns out one minute is as bad as five in a crowded aisle with lots of moving aviators.
The camera was in my pocket quite a bit for the summer and fall, usually while I was using another, medium format camera, and the film remained unexposed.
Finally, I resorted to an old game, taking pictures of whatever fell in the path of the sunbeams in our house. I would swear I was just going to finish the roll and then after five or so exposures, it would again sit idle for weeks.
The unusual northern sunbeams, which are reflections off the neighbor's window, fall on the bouquet on the dining room table.