N · Nude ski jump 
Great fun or recklessness? At age 16 surely both!
Halvor Egner Granerud (* 29 May 1996 in Oslo), a young Norwegian training ski jumping at professional level for international competitions, wanted to have some fun with friends after a barbecue. He took off all his clothes …
… (except stockings, ski boots, helmet, and gloves) and performed a safely stood 60 m ski jump. A friend jumped directly after him at a distance of barely one second filming the spectacular jump with a head-mounted camera.
– Source: Usenet and YouTube