Yup . . . Had to Happen

When the aliens sift through the wreckage of our civilization and find my son Ian's battery-powered skateboard, this will be their analysis: "This object looks like a lot of fun, but if the battery runs out while you are zooming up a hill and the skateboard stops suddenly, the laws of physics will cause the rider to wipe-out" and the aliens will be exactly right . . . luckily, Ian was wearing a helmet and so he only suffered road rash to his knees, elbows and hands . . . but I think he should only use this contraption on flat ground (with grass nearby).