This crazy-dangerous stunt almost didn't happen.

The plan was for Hollywood stuntman Mike Ryan to drive a 35,000 lb. tractor-trailer over an F1 race car driven by Martin Ivanov.

The problem? Rain forced the crews to postpone their first attempt by a day.

The weather cleared the next day, paving the way to a Guinness World Record of the semi off the ground for 83-feet and 7-inches.

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