Never underestimate the creativity that results from having nothing but time on your hands.My fire station is next door to a prison and I got to see some of their confiscated weapons. They include short swords, a cleaver/hatchet thing, firearms (inmates used to clean the gun range next door!) and all sorts of shanks, slashing weapons, and concealed knives. I've been meaning to take a pic of their display. And as a project I'm even making my own shank using only what I can find that an inmate would have access to.