Pretend you're a new cashier at a old gas station. It's night, it's just you in there, and there's no security/panic buttons in this ancient building. Some large guy with high body fat and wicker fedora strolls in and has his hand under his shirt. He says he'll blow your head off unless you get him the cash and reaches over the register with his other hand. He appears to have a gun hidden the shirt. You can't get the locked cash drawer open so as he jumps (rolls over) the counter to break into the drawer, his armed hand falls out of his shirt and you see he has no gun or weapon. What do you do? There is a working camera behind you recording if you care.