You need huge sand pit, sandy ridge or what you will call it. Huge hole in the ground where sand have been mined away. And a sledge. Then, hop on the sledge and let the downhill suck you. Speed gets really high, and the sledge is useless after few rides. Another fun thing is run like moose and take a huge leap from edge of the mine. Feels like flying, and soft, diagonal sand cushions your touchdown like snow, even from great heights. ...sounds ridiculous, and it may be it, but it was really fun. It was. .n