We've seen some slightly crazy stuff attempted on unicycles before, but attempting to race a pickup down a mountainside on one wheel definitely has to rank up there in the pantheon of 'funniest prospective things to write on the insurance claim form'.
In the video, downhill unicyclist (side note: best business card title ever) Gerald Rozenkranz seemingly races his buddy in a pickup down an Austrian Alp. He tackles pretty much everything you're likely to encounter in a ski resort in summer, including gnarly singletrack, trackless forests, and even the occasional group of beer-drinking tourists. Thank god he's wearing a helmet. [YouTube via Gearjunkie]