At the 2012 X-Games, Hot Wheels attempted a death-defying, double loop. Unlike when you were a kid and actively trying to destroy your toy cars, though, this was a life-size attempt, with real drivers behind the wheel. The massive stunt, with two 66-foot-tall loops, was completed by Tanner Foust and Greg Tracy, and now there's a short YouTube documentary on the process involved in setting up the stunt.
Loop De Loop
Successfully piloting an automobile around a giant loop is no easy task, but it's just not spectacular enough for the crew of Top Gear Live. Billing it as a world-first event, the live show's stunt drivers will attempt to spin their way through a giant loop twice in succession during the Top Gear Festival in Durban, South Africa on June 16 and 17.