I wasn't sure if this belonged here or Marksmanship & Gun Handling.
I can't tell what type of gun it is but the suspect racks the slide and the round gets jammed on the feed ramp.
The cashier kept very cool even with the gun just inches away from his face. I'm not sure if he was even aware that the slide was jammed. Even so, the suspect had his finger on the trigger the whole time!
Jimmy Johns Robbery - https://www.youtube.com/watch?v=2xdtZ-ZksDc