This video was sent to me by my brother, an avid mountain biker. Hang on to your helmet and click on the picture. (Watch this in “full screen” mode to get the full effect.) It doesn’t have anything to do with the military, but the all-downhill ride takes place in the steep streets of Valparaiso, Chile, and I pulled some liberty there once. So technically it qualifies.
(Snarky comment): Apparently the American at the end of the video believes that if he speaks English with a Spanish accent, the rider will understand him better.