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Host Richard Hammond, from the hit series Top Gear, explains the science behind videos taken from the Internet.
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Episode 1
So ice in your drink is fine, ice in your face not so much. Jumping without a parachute is just best left to the experts. When cornering in a go Kart, you need to know the science or the corner will get you. Free running, painful if you get it wrong and using an outboard motor, no idiots allowed.
