John's post about Horse Boarding is pretty nifty, but I believe I can top that. Behold, the extreme sports of yak skiing. All you need are a yak, a pair of skiis, and some nuts (well, it helps if you yourself are a bit nuts):
In the Indian hill resort of Manali, Tibetan Peter Dorje runs an operation dedicated to the most implausible extreme sport in the world: yak skiing…
Pete heads to a high slope with the yaks, trailing out a rope behind him. You wait below, wearing your skis and holding a bucket of pony nuts. When Pete reaches the top, he ties a large pulley to a tree, loops the rope through it and onto a stamping, snorting yak.
Now it’s your turn—and this is the important part. First tie yourself onto the other end of the rope, then shake the bucket of nuts and quickly put it down. The yak charges down the mountain after the nuts, pulling you up it at rocket speed. If you forget yourself in the excitement and shake the bucket too soon, you’ll be flattened by two hairy tons of behemoth. Or as Pete says, “Never shake the bucket of nuts before you’re tied to the yak rope.”
Link - via The Rag Bag