Everything2.Com has a funny page on The Anime Laws of Physics with gems like,
#12 Law of Phlogistatic Emission – nearly all things emit light from fatal wounds
#20 – Law of Militaristic Unreliability Huge galaxy-wide armadas, entire armies, and large war machines full of cruel, heartless, bloodthirsty warriors can be stopped and defeated with a single insignificant example of a caring/loving emotion or a song.