Nice breakdown there BEP, very nice.
Whether Martin was high or not, i simply couldnt care less... what matters is that here we have a young man (not a child) walking alone on rainy night, on private property he had no business being in, that had recently had a rash of burglaries, and it just so happens that he'd previously been caught with stolen jewelry and thieving equipment at school.
Throw in circumstantial evidence like him being thrown out of school for drug dealing and what you have is a rock-lock pattern of criminal behavior... weighing all of that, yep, Zimmerman had every right to ask him what he was doing there that night, the bold young man took exception to it and pushed things into a physical realm.
Did little goofy ass Zimmerman try to get all physical? even with his pistol thats highly questionable, i really dont think he has the guts, he was probably very relieved that Martin had lost him at first... my heart tells me he was surprised and jumped by the young man... if that makes me a racist in some peoples eyes, then so be it.