Parkour is something you cant do immediately with out practicing. Parkour is a activity that people like to record because it is just so fascinating. It can be used for entertainment or just for fun. I know some people may think you are lame or think you are cool for doing parkour but that is the thing. What if they cant do it and they are just jealous of what you can do and they cant do it. Parkour has many tricks to do so you cant master them all in just a few weeks. Unless you master 20 tricks a day. I don't think that may be possible but no one knows if it has been done before.