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SAN DIEGO (AP) _ A daredevil motorcyclist thrown from his bike in a Fourth of July stunt regained consciousness as he slowly recovered from critical injuries.

Bubba Blackwell was trying to jump a record 22 cars Wednesday when he crashed into the landing ramp and went flying from his bike. He attempted the jump before a crowd of 25,000 at the Del Mar Fair.

Dr. Gary Schwendig, a trauma surgeon at Scripps Memorial Hospital, said Blackwell regained consciousness Thursday and can move his arms and legs. His injuries were not immediately life-threatening but he remains on life-support systems and is vulnerable to blood clots and infections.

The crash was Blackwell's second serious accident in six years. In 1995, he broke several bones and punctured a lung after falling short of a ramp during a car-jumping stunt in Portland, Ore.

Blackwell has broken a number of records set by Evel Knievel, and his stunts have earned him appearances on ``The Tonight Show with Jay Leno.''