It's rubbish, as the Brits say. My father took this picture on a really good safari we went on in Abu Dhabi. Here I am, exhausting myself, only to find that my sand board would barely inch down the mountain. I have no idea how he managed to miss capturing it on film, as it was the most painfully slow downward journey I have ever taken.
Whoever invented this "sport" has some answering to do for it.