Hmmm... have there even been any "axe-murderer" movies? GOsh, this is probably a piece of culture that's slipped by. When I took my pool operators' license test we had to list 8 reasons to close a pool and I was stuck, so I said "axe-murderers or any other unforeseen but unsafe circumstances." It was marked right - but when I got my postcard to tell me to go pick up my license, the grader penciled "axe-murderers?" on the postcard... which may have unsettled the post-person...