The cold weather training of South-Korean army's special warfare force is high level badassery of the level I have never seen before. It's like when nuclear powered attack submarines break the Arctic sheet after surfacing through three feet of ice. But these are humans. Quite literally cool [Republic of Korea Armed Forces]
If board sports are your thing, but the current weather and conditions aren't ideal for snowboarding, skateboarding, or surfing, this spring-mounted Gyroboard alternative promises to keep you in shape and let you train all year round.