What I don't get is, if Zimmerman really thought Martin was a dangerous guy who was carrying a weapon and was up to no good, why did he follow this dangerous guy after being told cops were on their way and being told not to follow Martin. It's obvious he initiated whatever altercation happened between him and Martin when he had no reason to do so. This was an extremely over zealous neighborhood watch guy who wanted an adrenalin rush so he decided to play vigilante.