One day a man with no arms showed up at a monastery, asking if there was any work. The monk thought for a while and asked if he could ring the bell in the tower by running into it with his head. The man with no arms thought he could manage that and started his new career.
For several days, the man happily rang the bell. Then one day he slipped, missed the bell, and fell off the tower, plunging to his death. The local constable showed up and asked the monk if he knew the man. The monk said “No, but his face rings a bell.”
Same monastery, few months later. A second man with no arms shows up and says he heard the monastery had a job for a guy with no arms (and an opening). The monk explained and the man took the jobs. He also happily rang the bell for a few days before slipping and plunging to his death. The constable showed up and asked if the monk knew the man. The monk said “No, but he’s a dead ringer for the last guy.”