Free running is not sport because a)they aren't usually competitions b) it's very dangerous c) you can do it anywhere base jumping is dangerous because a) they parachutes are very small b)there isn't much time to open the parachute c) the buldings are very small cave divers have to swim a) very carefully b) very quickky c) without a light luge racers have to a) lie on the boards b) sit or lie on the boards c) stand on the boards