The amped-up drivers get their first experience on the course, but not all of them have what it takes to dominate behind the wheel.

A millionaire with a Lamborghini, a truck driver in a stock Mustang, and a slew of other competitors in tricked-out rides push one another to new extremes.

The qualifying rounds continue with the craziest obstacle faced to date and six new racers, the stand-out being a 21-year-old nicknamed the Baby-Faced Assassin.

With the last three spots in the top 12 up for grabs, the remaining drivers- including a man with four jobs- pull out all the stops.

As the knockout round starts, the drivers must prove themselves on a newly redesigned course and not everyone's car survives the chaos.

A new obstacle humbles the drivers, even an indomitable racer. One contestant's overconfidence proves costly on the track.