http://www.youtube.com/watch?v=gmx3kNvBqAM The title of the video clip is "овчарски скок" or "pole vault" in Bulgarian language. "Oвчарски скок" literally means "shepherd's jump" and shows long tradition and roots of pole vaulting in Bulgary.
"It is not necessary to change. Survival is not mandatory." W. Edwards Deming