Starting in the early 1700s, medical students learned about human anatomy by dissection. For that, you needed a fresh body. NRA Museums registrar Erin Sabatini is dressed in black for a reason! A lucrative cottage industry of body snatching sprung up to meet demand, and nothing would stop the grave robbers. The Cemetery Gun was born. It's a flintlock blunderbuss mounted on a spike with tripwires. She shows John Popp how you could load it with a blank, rock salt or a lethal load of rocks. It could be rented for a couple of weeks by a family to protect their loved ones until they were naturally "demonetized."