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	This is The Reason Why Airplane Engines Are So Big
	This video explains the physics behind the perfect size of a jet engine. It makes a lot of sense! Check it out:
	How To Make Snowboarding More Extreme: Use Handheld Jet Engines [VIDEO]
	Want to make skiing or snowboarding down a slope even more terrifying? These folks from DreamScience have a crazy idea and it is called "The Thrusters". It is basically jet engines that you strap on to your person. Need more speed? Turn it on. Like ...