Ryan Hampton, who is 52, tests tire performance at the Goodyear Tire Proving Grounds, in San Angelo.

We've even seen prototypes for everyday cars that roll over sharp ... decompress due to the weight of the car. Going 70 miles per hour down the highway, this happens about 1,000 times per minute ...

However, as the muscle car era wound down, so too did the Road Runner. Its final year was 1980. Speaking of the Plymouth ...