What is Parkour?
Le Parkour or l'art du dplacement (English: the art of movement) is a physical art of French origin in which the participant called a traceur attempts to pass obstacles in the fastest and most direct manner possible. The obstacles can be anything in the environment, so parkour is often practiced in urban areas because of many suitable public structures, such as buildings, rails and walls.
Source: Wikipedia
It's almost like the movements of cat. Flowing freely but with graceful steps and balance.
If you're still wondering what this kind of sport entails then heres a video link to someone practicing parkour.
I think it's an amazing video. You have got to watch it to the end, you'd be like 😲 throughout. I love the part at 03:46 where the dog is chasing the guy and he soars through the car window and out through the door at the other end!