A former college football player heralded a hero for tackling an armed student at a Portland, Oregon high school credited the act to advice given to him by Nebraska coach Scott Frost.

Keanon Lowe, who coaches football and track and field in addition to being a security guard at Parkrose High School, wrestled the alleged gunman, Angel Granados Dias, 18, to the ground before anyone was injured.

Lowe played wide-receiver at the University of Oregon when Frost was the team's offensive coordinator, said in an interview with The Athletic that he remembered a meeting where Frost talked about handling a crisis situation. 

“Coach Frost told us that if you haven’t already made up your mind what you would do in an emergency situation, then you are going to be too slow and you are not going to help the situation,” Lowe told The Athletic. “It’s going to happen too fast.”

Lowe described  the chaotic moment in an appearance on ABC's "Good Morning America." He said he was radioed to the Fine Arts Building, unaware of the situation.

"I walk into a classroom, ask if the student's there. I'm in the classroom there for 15 or 20 seconds and the door opens and there is a student with a shotgun," Lowe told "GMA." "Everything happened so fast and it was the longest fraction of a second of my life, but I kind of assessed that situation and my instincts kicked in.

"I lunged for the gun and we both had the gun, we had four hands on the gun. Students are running out of the back of the classroom and I'm just trying to make sure the end of the gun isn't pointing toward where the students are running."

Students told ABC affiliate KATU that Lowe saved the day.

"He's a hero," one student told KATU.

A police sergeant said the shooting threat ended with the "best-case scenario."

"It feels great [to be called a hero]," Lowe told "GMA." "But I feel like I was put in that room for a reason. He didn't know I was in that room when he opened the door and I think there's things in my life that have happened that have prepared me for that very moment."