Here's a pretty sweet video of a guy riding his 800 watt off-road electric skateboard on some trails. Not sure what brand of electric skateboard it is in the video, but both the UM70sx and the m4 800 are 800 watt electric skateboards with off-road tires.
Video of an Off-Road 800 Watt Electric Skateboard in Action
US $31.00
Great to see this skateboard in action, now with this I surely want to own one have a try with it myself. Powered by a 800 watt battery which will give you a power to do all the moves that you want.