RADNOR, Pa. (CBS) — The father of a Delaware County teenage boy, left critically injured, in a devastating crash recounted those moments of terror only to Eyewitness News.

Kelson D’Ambra remains hospitalized. He and a friend were hit by a car in front of his house.

“It sounded like you know crunching wood and a big bang.”

Kelson’s father, Mark shared what he saw that day.

“It was scary because he was just laying there in fetal position. It was quite unnerving. She wanted to get up so we tried to make sure she stayed down. He wasn’t moving. He was just making some sounds.”

It happened Monday morning. The two Radnor High School students were waiting for their bus when police say the driver of a Silver Nissan careened off the road and crashed into D’Ambra’s front porch. Kelson’s friend has since been treated and released. (see related story)

“We’re very grateful that she’s back home with her family. She has only scars and scrapes, very minimal injuries, we’re very happy about that.”

They pray Kelson will also pull through. For now, the 15-year-old is in the hospital sedated with a broken leg and serious head injuries.

“We’re just at his bedside, waiting and watching with the doctors. They can’t tell if there’s no damage, permanent damage or temporary damage to anything until they wake him up. We’ve been praying and hoping ever since it happened that everything will be ok.”

The D’Ambras have lived in their home on Conestoga Road for the last six years. They’ve dealt with a handful of accidents so far. This time, they are determined and hopeful it doesn’t happen again.

“We’re trying to get some kind of proactive change to the road to make it safer, like rumble strips to make it easier for the cars to grip the road, so maybe that’ll be helpful.”

In the meantime, police say the road was free and clear of any debris or snow at the time of the crash so why the driver lost control is unknown. The investigation is continuing.

Reported by Elizabeth Hur, CBS 3

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