A U.S. Marine Corps veteran who stopped an attempted robbery at an Arizona convenience store this week in a dramatic encounter caught on video told Fox News on Friday how his act of heroism went down.

James Kilcer told "America's Newsroom" he takes his personal safety, and the safety of others, "very seriously." 

"I turn around to go and leave, kind of walk out and as I'm turning around I hear the door kind of open real aggressively," Kilcer said about the incident Wednesday. "At that point, the ‘spidey senses’ tingled a little bit."

MARINE CORPS VET DISARMS GUN-WIELDING ROBBERY SUSPECT AT ARIZONA GAS STATION, VIDEO SHOWS

Three unidentified people entered the store with one armed frontman leading the way.

"I saw two other guys with no other weapons and decided that's the guy that I'm going to hit," Kilcer says. 

In one motion, Kilcer grabbed the gun and without hesitation hit the other suspects with a bag of his store purchases, which he said included two Gatorades, two energy drinks and "a snack."

A Marine Corps veteran in Arizona was caught on video single-handedly disarming a gun-wielding juvenile who was attempting to rob a gas station on Wednesday.

The 8-second-long surveillance video shows the Marine Corps veteran grabbing the handgun and tackling the juvenile suspect. The other two suspects fled the scene. (Yuma County Sheriff’s Office )

"I was actually going to take control of his head and the gun at the same time, and the bag just happened to be heavy and attached to me and it smashed him right in the face," Kilcer said. 

While the gas station clerk was "a little worked up" about the incident, according to Kilcer, he jumped over the counter to chase the suspects. 

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Kilcer credited his Marine Corps training's muscle memory of knowing what to do in such incidents in addition to being "mentally prepared" when the attempted robbery occurred. 

The armed juvenile suspect was arrested and taken into the Yuma County Juvenile Justice Center on one count each of armed robbery and aggravated assault. The search continued for the two other suspects who escaped.