I call BS.
Cite a case where skis decapitated an occupant of a car in an accident.
I'm not saying you absolutely can't, but you'll have to search high and low for even one....in the 100+ years of riving history.
As to the question, I like to court near certain death myself, so I just put 'em in the back of my Outback. I also run with scissors...
You should up your stunts by driving with skis in a convertible. If you survive that trip, buy lottery tickets immediately as you must be the luckiest person alive.