This happened last week in Yuma, Arizona.  Security cam filmed a customer single-handedly stop an armed robbery inside a gas station.  Marine veteran James Kilcer had just bought something when two crooks entered the store with guns.

It took him seconds to bring the first guy down . . . and he held him until the police arrived.  The other crook, plus a third robber who was outside, took off running.  One of them was arrested later.