It's being billed as the smallest car in the world.
Show host Jeremy Clarkson unveiled his invention called the P45 on the British car show Top Gear.
He did it by dangerously driving in and out of traffic.
The P45 is a hybrid that looks more like a go-kart.
The helmet serves as a roof and windshield and the armor he wears while driving is the car's body.
At one point Clarkson reached a top speed of 34-miles per hour.
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