Mud Flaps

[shatto]

http://lh4.ggpht.com/_4xQFBZJE2fI/TTGnsFk-6xI/AAAAAAAAFdM/3k1BUP6G-K0/s720/DSC01262.JPG
Ever wonder why big truck mud flaps hang to within an inch of the ground?
Maybe so this doesn't happen.