For one thing, I think everything happened much more quickly than anyone of us could imagine. For another, if you are a neighborhood watch person and you see someone kind of ambling around and looking into windows, do you really want to identify yourself as someone this person might not want to answer to? For all Zimmerman knew, Martin could have had a gun. He didn't respond well to him as it was. He obviously hated white people. He didn't perceive Zimmerman as a threat, only a nuisance that he had to get rid of. If you read the transcript, Zimmerman did not keep following him. He said he lost sight of him. How do you keep following someone if you have lost sight of them?