"Run, hide, fight."
Mr. Shaw couldn't do #1 or #2, so he did #3. Evidently the muzzle of the rifle was pointed down; "[he] saw the opportunity and...took it."
"...rushed the suspected shooter, disarmed him and threw the AR-15 rifle he was carrying over the counter." Incredible job!
https://www.tennessean.com/story/new...ter/540061002/