DAYTONA BEACH, Fla. — Dale Earnhardt Jr. has been involved in a frightening, multi-car accident at Daytona International Speedway.

Earnhardt's car flipped upside down during Saturday's Nationwide Series race when the car behind him hooked his rear bumper, sending him sailing onto his roof along the superstretch.

His car was hit several times as it bounced along the track and through the grass, finally flipping back onto its wheels before coming to a stop.

Earnhardt climbed from his car without help, then took the mandatory ambulance ride to the care center. He was released a few minutes later.

His father, Dale Earnhardt, was killed on a last-lap accident in the 2001 Daytona 500.