I work in a vapor store. I was closing solo on Sunday night, it was about 10 minutes till closing time and I was performing my closing duties when a man came in and stood by the counter, I asked him "Hi there, how can I help you?" and the man pretended he was interested in purchasing a vaporizer for a minute before he told me "I have a gun, give me everything in the register."
Adrenaline kicked in, and instead of simply surrendering the money I decided to call his bluff and I said "I don't believe you have a gun, and unless I see a gun I'm not opening this register" I assume the man didn't have a gun, because next thing I know he sucker punched me in the temple. It didn't hurt that much, and I was in shock. I hit the speaker button on the phone next to me and quickly dialed 911. At this point the man shoved everything off the POS station, including my personal cell phone, and ripped the land line out of the wall. Then he took a hard swing and planted a punch squarely on my nose, knocking me down to the ground and he started trying to pull my wallet out of my back pocket. (Spoiler alert: the wallet was empty) The man postured up while over me like he was going to start swinging again, so I told him "stop, fine, take the money!"
I reached over and opened the drawer (not the register, a regular counter drawer) and pulled the register key out and threw it at him, he opened the register, took approximately 300 in cash and bolted out the door.
If the man had been paying attention as I opened up the counter drawer, he would have noticed that the entire week's worth of deposits were sitting there in plain view, probably a couple thousand dollars of deposits. If he was paying more attention he might have also noticed that there were 5 cameras and that the entire store was glass and acrylic. Needless to say the police got crystal clear footage, and perfect prints from several locations. I picked him out of a lineup today. I may have a broken nose, but the man will probably be spending a few years in a cell now.
Either way, I don't think I'll ever be calling someones bluff about a gun ever again.