When a man pulled two guns on convenience store clerk Wazir Jiwi and demanded money, Jiwi asked how much he wanted for one of the guns. He said $100, which Jiwi paid him. Then Jiwi offered to buy the second gun. The robber handed it over, grabbed the cash and headed for the exit. But Jiwi had pushed a button under the counter that automatically locked the door.

"The thief turned to me and asked what was going on," Jiwi says. "I told him to bring the money back and I would let him go. He brought the money back, and I opened the door."