What is it with the shoe throwing?

I know that in many Arab cultures throwing a shoe at someone is a gesture of great disrespect, indeed just showing someone the sole of your shoe is derogatory enough. I just don't get it; but I must say 'hats off' to this man...



Even better, you can now have a go yourself.
Kast en sko på Bush

(or should that be Kast sko mot Bush? Norwegian is a language where my skills sadly lack).
-------------------------
Via The Invisible Pink Unicorn and LGF (now there is an unlikely pairing!).