martial arts
Artist Phil Hansen has a different interpretaion of the term "martial arts". He painted a mural of Bruce Lee, basically karate-chopping the wall with his paint-covered hands. Watch the video of the process to get the full effect.
Phil Hansen tends to use a lot of non-traditional materials and methods in his artwork. A couple of other pieces that I like on his site are his portrait of Mother Teresa made from dandelions and a series of pieces he painted on his belly, each one on top of the last. There's also a video of how his belly paintings progressed.
(Via Wooster Collective.)