By now, you’ve probably heard about the tragic incident today at Franklin Regional High School in Murrysville, Pa., 18 miles east of Pittsburgh. A 16-year-old student injured 24 people — at least one critically — with two 8-inch steak knives just before the start of school this morning in a crowded hallway.

The student, Alex Hribal, reportedly ran down the hallway, stabbing and slashing students as he went. One student is on a ventilator after the knife missed his heart by only millimeters. At this point, doctors expect everyone to survive.

The seemingly mindless act was stopped by an assistant principal who jumped on the perpetrator before he was able to injure more students. Right behind the principal was Ian Griffith, a senior at Franklin Regional who is set to enroll at Penn State in the fall. Griffith was interviewed by WPXI about his act of courage this morning.

“I was in the school and I came down the stairs and I saw the kid…I turned around and saw him stab the police officer,” Griffith said. “Mr. King took off to take the kid down and I was right behind him. We both jumped on him and immobilized him.”

“I was looking for a garbage can to hit him with. I was put into the situation. I didn’t know what was going on until I was in the middle of it.”

Reporters then asked Griffith, “Where are you going to school?” He simply responded, “Penn State.”