Most skateboards — and certainly most electric skateboards — are designed for use on the smooth, man-made trails we like to call sidewalks and roads. The Emad Dirt Rider Electric Skateboard ($650) lets you leave these paved paths behind. Thanks to large off-road tires, a powerful 800-watt motor, and flexible trucks, this versatile board can handle sand, mud, gravel, and dirt with the best of them, propelling persons up to 330 lbs. at speeds of up to 19 mph. Just don't forget to wear a helmet — word has it that hitting a tree going downhill at 20+ mph is a lot rougher than simply bailing off the rail at the local skatepark.