Ever Heard of Parkour aka Free Running?

I have found that not many people seem to know about this sport, although, it's got many thousands of enthusiasts around  the world. I first read about it in the Tamp Tribune a couple years ago. There was a link to a web site, so I checked it out because I was curious.
Wow!  I think I watched that first video about six times. I was amazed to see human beings, young men in their teens and twenties, it appeared, running through urban areas and scampering over objects, running sideways along walls, flipping, like chimps.