We've heard so much lately about the dangers of talking on the cell phone or texting while driving. One danger we haven't heard so much about lately doesn't involve any new technology but rather just the people traveling in the car.

A few of Glen Carter's memories from Monday night are fuzzy.

"I remember waking up and people yelling,” Carter said at a hospital.

He won't soon forget other things.

"I remember my best friend laying here,” he said, motioning.

All of those memories are from the moments just after the crash on U.S. 60.

"We always talk back and forth, laugh, and have a great time," said Glen.

By all indications, that's what was going on Monday -- and possibly caused the accident.

"Something was going on in the backseat, the driver turned around; when he turned back, he swerved, overcorrected, and flipped," said Cpl. Jim Beckett.

According to the Missouri State Highway Patrol, neither speed nor alcohol played a role in the crash.

"It's difficult for any of us to recognize our friends in the car are a real problem to our safety,” said Ira Copeland, a defensive driving class instructor.

Copeland says he sees it all the time.

“You sit in front of the computer, and it can do 1,000 things at once, but this computer can't do that,” he said, pointing to his head.

Glen was in the back, not wearing a seatbelt. He suffered a cut to his leg, while another of his friends was ejected from the car.

As Glen left the hospital, he continued to worry about that friend as he looked back on an accident that has changed his perspective and looked ahead to a summer far different than what he'd expected.

"Are you scared to drive?” he was asked.

“Yes.”

“Why?”

“Because of what happened."

Of the five teens involved in the crash, two, including Glen, were released from a hospital on Tuesday. When first responders arrived at the scene, they assessed the boy who was ejected and said he suffered life-threatening injuries.