Host Richard Hammond, from the hit series Top Gear, explains the science behind videos taken from the Internet.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.
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