Zach Petkewicz was in a classroom in Virginia Tech's Norris Hall when the shooter made his way down the hallway and tried repeatedly to enter the classroom full of students.
That shooter eventually killed 33 people including himself and it's possible he could have killed more if Petkwozicz, a senior, had not acted.
At first, Petkewicz and his classmates thought the gunshots were just some construction. Then he heard a girl scream.
"That's when he put two bullets into the center of the door, thinking we were up against it, trying to close him out. He then reloaded. I was against the ground, right against the door. I thought he was coming in for a second round, but for the grace of God, he just kept going and didn't try to get back in there."
Including himself, Petkewicz said there were 11 students in the classroom. The experience has still not fully registered and he said it's "kind of surreal." He didn't see the shooters face and didn't see his demeanor. All Petkewicz could think about was keeping the shooter out of the classroom.
"I didn't hear a word from him," Petkewicz said. "And I didn't see him at all. I was — I was just trying to push that table up against that door."
Of course, Petkewicz's parents are very concerned and wanted to come get him. Petkwozicz, who looked visibly shaken during his interview, said he would rather stay with his friends.
"Never thought in my wildest dreams I'd be in a situation like that," he said.