I know a person who bought their first handgun, a revolver, and ended up putting a hole in their bathroom wall because they didn't read the manual before loading it and cocked the hammer back and wondered why they couldn't unlatch the cylinder anymore. They had a Florida carry permit for almost a decade, and since the state's renewal policy is just a fee, photo and paperwork, it was obvious that it had been a long time since they'd ever had any training.