I have some questions about Parkour, would you please help?

Parkour is the activity where one uses their own human body to flow through an environment to get from point a to point b as fast and efficient as possible. Parkour does indeed originate from France, it was founded by David Belle. There are no specific laws regarding Parkour, however, you COULD be questioned by Police/Security as there are some happenings. I don't blame them however, they can misunderstand it as running away after stealing something (just one of the things they might think). Parkour is difficult in both mental and physical aspects. You've got your body doing the movements and then you've got your mind questioning thing's like, "Can I make this jump and not hurt myself?" So there are some mental barriers that make it difficult. On how fast you can learn Parkour is all up to you, practice makes perfect =D. Hope this helps.