Rachel Jeantel made it sound like Travon Martin profiled George Zimmerman... or... what is a "creepy ass cracker"?

TalkLeft describes "a train wreck" witness:

She said (on direct exam no less by the prosecutor) that shortly after first spotting Zimmerman, Martin described Zimmerman to her as a "Creepy-a*s Cracker" and later, described Zimmerman a few times as "this ni*ga" (as in this ni*ga following him.) The two minute clip above is of Rachel and the prosecutor repeating creepy a*s cracker over and over as the court reporter struggles to make out what she's saying, Rachel explaining that creepy as* cracker means a white person, then and expressing concern the creepy guy might be a rapist.

So "cracker" is a way of saying white guy, but "ni*ga" is apparently just a way to say guy? I can understand that, but I'd like to ask a few questions — out of curiosity. I'm not saying the defense lawyer should ask this on cross-examination. (Which should make for some interesting TV today.) I'd like to know whether perhaps Trayvon Martin perceived Zimmerman as a person of color and not a white man at all. You assume that there's no way he'd say "cracker" if he didn't see him as white? But he didn't say "cracker." He said "creepy ass cracker." I understand the use of "ass" as an intensifier connected to the adjective "creepy." Creepy-ass cracker, as in very creepy cracker.

But "ass" could go with "cracker" — "ass-cracker." The conversation continued, according to Jeantel: "So... he told me the man was looking at him, so I had to think it might have been a rapist."

Why rapist? A man raping a man? How common is that as a fear? But it was the first thing Jeantel thought to say after he said creepy-ass cracker/creepy ass-cracker. The term "ass cracker" could easily mean a man who rapes a man, especially one who goes after a teenaged boy.

Urban Dictionary has some definitions of "ass cracker" that predate this trial:

1. ass cracker...
One who not knowing the code or combination to a particular slice of ass is nonetheless able to get inside the ass...

2. Ass Cracker...
One who engages in anal sex.
That wanker is an ass cracker.

3. Ass Cracker...
A term used to describe a man with a large enough penis, to brake the anus of the woman or man he is having anal intercourse with.
"Damn, his's cock is so big, he is definatly an ass cracker!"

The word "creepy" makes special sense if you reinterpret the "ass" to go with "cracker." Martin said a man was following him, looking at him. He might have thought Zimmerman was a man out looking for sex and was watching him for that reason. What conversations had Martin had in the past with Jeantel about worries of this kind. She "had to think it might have been a rapist."

TalkLeft says:

She describes how Martin was "right by his father's house" after he lost Zimmerman, and refused to run home. I think he had plenty of time to go home, he obviously chose not to....

Why didn't Martin take Jeantel's advice and run home? The rapist/ass-cracker theory makes sense of Martin's decision to go after Zimmerman. If he saw Zimmerman as a sexual predator, he might think confrontation was a good idea or even an important step: These creeps in the neighborhood need to know that I'm not their prey. It's not enough to run inside daddy's house. My manhood must be established here and now or I can't walk free around here anymore.