Silly Chop-Socky Physics Demonstration! Technique, Training, Focus, Power. All are important when trying to break boards bare-handed. However, there are also important physics that explain why the boards   more...are broken.
From http://www.slightlymadscience.com
"Slag" courtesy of "A Childs First Funeral" (http://www.myspace.com/achildsfirstfuneral)  less