It's a 2nd-hand account posted in the comments section, but this is apparently the story:

This jump was filmed at Copper Mountain in Colorado. My friend was working the night it happend. Apparently this guy was getting wasted at Jacks, the bar at the mountain, when he bet this guy (who had a camera) that he could jump the entire escalator. My friend said that when he went into the bathroom to check on him there was blood onevery wall. I dont blame the guy, I would do the same if I had to listen to the live entertainment at Jacks for any length of time.
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-Rob Riccardelli
80GB 16MB MK2 090000736