Tampa, Florida -- A 16-year-old student at Plant High School dropped to the ground in the final lap of a timed one-mile run during a physical education test Tuesday.

Carrie Mahon has been a coach at H.B. Plant High School for 12 years and said she's never seen a student collapse and become unresponsive.

"We got on the radio and called for help," she said.

"I heard coach Mahon call for the nurse and I could tell by her voice that it was something serious," said Laura Figueredo, an assistant principal for the past 28 years at the school.

Figueredo and the school nurse acted fast. The nurse started CPR and Figueredo grabbed an AED defibrillator machine that was stored just 20 feet away from where the boy collapsed on the track. The machine was inside a concession stand.

"Seeing the situation was the scariest thing I have ever seen in my life," said Figueredo. "I never want to experience it again."

The nurse had to use the defibrillator twice but it worked. The boy started to breathe again before paramedics arrived. He was taken to Tampa General Hospital.

Using the defibrillator within three minutes of a person collapsing increases their chances of survival by 74 percent. Hillsborough County schools have had to use their defibrillators five times now this school year.

The district has between one and five at every school since 2010. Each one costs $1,250.

Principal Robert Nelson told 10 News he's looking into having every staff member trained to use an AED Defibrillator.

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