Apparently one of the most insulting things one can do to another in the Arab culture is show them the bottom of your feet or throw your shoes at them. In case you didn't hear, President Bush was conducting a press conference in Baghdad over the weekend when a protester hurled not one, but both his kicks at the President's head. Bush was quick to duck and cover and neither shoe made contact. You can see the full story here.
And in case you missed it, video of the incident is below: