Cheese rolling. What it says on the tin. You roll a big cheese down a steep hill and plunge after it. First to the bottom wins the cheese. Vagabrothers 8'30" report. Minimalist clip for 2015.
Pakour with wheelbarrow. The latest thing to come out of Germany. You may leave your skateboard at home.
Wife-carrying. A long tradition in Finland as "vaimo kuljettavat" where you carry your wife round an obstacle course. Most successful couples start, and finnish, with the woman upside down in the "Estonian" style. Vagabrothers 7'30" report. or with the Telegraph: Shorter, stronger, wetter.
Wood-chopping, Basque-style. You stand on a section of log in sneakers and chop though the wood without trimming your toe-nails.
All good fun and no more dangerous than rugger.