LINDA WERTHEIMER, HOST:
Good morning. I'm Linda Wertheimer. Hot Wheels and their twisty plastic tracks have long been a source of small scale thrills. But on Saturday, daredevils Tanner Foust and Greg Tracy went behind the miniature. They raced two rally cars around a 66-foot tall version of a Hot Wheels loop-de-loop racetrack. Seven times gravity was the hardest part. The only thing broken was a world record. Don't try this at home. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.