I just found out—quite by accident—that someone had skied 12,000 feet down Mt. Everest.  (They reported his name, but I forget it.)

Everest, I remember from school, was some 29,000 feet high (I'll check and correct that if I'm wrong*), which means the skier Skied just about halfway down.  I've never gone Skiing, so I don't know whether the further you ski, the harder it is on your knees.  (*29,032 feet above sea level.  They say, actually 29,032.68 feet, but I can't give a lot of credence to those last few inches, honestly.  Half of that would be 14,500 feet.  But this gentleman couldn't ski further than the edge of the snow line.)

Honestly, this is the sort of daredevil stunt I really dislike.  I expect this gentleman's entire claim to fame is based on dangerous undertakings—and being the first to do them,  perhaps?—so, obviously, he'd head towards an insane idea like skiing down Everest like a lemming to the sea.

Kay.  (Google suggested 'Kayla!'  Hmm ...)