The nerves hit Jimmie Johnson as he stood on the starting grid before the Rolex 24 at Daytona.
The seven-time NASCAR champion is beginning a new chapter of his career -- at 45 years old -- in unfamiliar race cars. He was tabbed to start the most prestigious sports car race in America for his Action Express team and Johnson had just one goal for his first stint in the Cadillac.
"Certainly didn't want to break the toy in the first couple of hours," Johnson said after driving about 70 minutes Saturday around Daytona International Speedway.