Broke my sternum, two ribs, my tailbone, and gave myself a concussion. Nothing like camping in a beautiful place, only to be up all night puking. My sternum painfully cracked for two years after that whenever I took a deep breath.
I can't find any evidence that anyone rides down the one in the photo above, however
also
You can take a run down the mountain year-round for about $20.
In summer, they use a sled with wheels, which isn't as fast as those which run on ice
but still gets up to a speed
of about 65 mph. and can pull 2.5 G in the corners
(on ice, they pull 4.5 G!).
I took a ride and was blown away; the turning velocity of the wheel-bob
makes motorcycle roadracing seem
tame, especially when it goes nearly upside-down through the banked turns.