Watch the video that stunned a nation

At the spring youth football festival at Colorado State on Saturday, Caden Thomas was wandering along the sidelines with his father during the team's intrasquad game.

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They were near the end zone when receiver George Hill, trying to catch a touchdown pass, didn't see the boy in time and crashed into him.

"Well, there's the sickening thud," Caden's father, Michael Thomas, said Tuesday.

"I was just tremendously worried about the rest of his life. You make automatic assumptions there will be some damage when you see something that horrific."

The team's trainer and doctor rushed in to help Caden as his father held him, and Hill waited nearby, worried about the little boy. Caden was bleeding from a deep cut on his head, but he was conscious and his neurological exams were normal.

"He was saying he wanted to go home," Thomas said. "I think he had a pretty good idea that this was going to require a trip to the hospital, and he was none too excited about that prospect.

"To see he bounced back so quickly was really a blessing."