Her best statements are equivocal. "Get off, get off" is screamed by somebody, but normal voice comparison with screams over the phone? In any case, if GZ is winning fight, then why use gun?
She has nothing to help with GZ's injuries, and following someone is not against Florida law.

West is doing a masterful cross exam on a difficult witness.  The first thing you have to do is patiently nail them down on all the details.  Then you can start impeaching them when they have no wiggle room left.  He is still on step one.

She said Sybrina Fulton tracked her down and texted her about meeting. She said she called or texted her mother, telling her mother to tell Sybrina that she (Rachel) couldn't talk to her. She was irritated to find out that her mother had given Sybrina permission to talk to her. Rachel said she didn't want to talk to Sybrina because she was afraid Sybrina would cry and get emotional, and she doesn't like that.

She acknowledged that she lied about being 16, not 18, in hopes that she wouldn't have to talk to people. She admitted that she continued to lie about her age,  even under oath, until someone (I think the prosecution) discovered she's 19 now.

She doesn't seem to understand the seriousness of lying under oath.

She also acknowledged lying about being in the hospital because she didn't want to go to the wake and see Trayvon's body. Again, that's understandable, but there's no way to know now when she's being truthful or not.

Her story has changed in substantial ways over time, most recently with her saying that Trayvon said, "Get off me. Get off me"  -- something she never said before.

Rachel did get upset, such as when she said, "You don't understand." But she always seemed to be talking about her own suffering. So far, she hasn't expressed how horrible it is that Trayvon died or that his parents are terribly sad. At one point, she acknowledged that she didn't want to get involved because she didn't want to be inconvenienced. (Perhaps someone else remembers the exact question.)

She said she knew a couple of days after TM's death that the authorities knew who the killer was, and so she didn't see any need to talk to anyone in law enforcement or the family. Although she has expressed an interest in criminology, she said she thought police would call her if they wanted to talk to her.

She said friends of hers went to Trayvon's wake and they talked to her about it, but they didn't mention that GZ wasn't arrested. That seems so odd. I forget when she found out, but it was at least several weeks later. Miami high schools had a lot of agitation over the case, and again, it's odd that she didn't hear anything about it.

Re: her attitude. I know that anyone who mentions that is accused of having a problem with "uppity" black women. And I could certainly understand if she snapped at West (because I'm ready to do that, too). But if she truly wanted justice for Trayvon, why would she roll her eyes at Bernie de la Ronda and, in general, show contempt for the process? Tracy Martin has laughed and cried, and looked down a lot. He and Sybrina must be hating this.

This is a witness who has been deeply coached, though she might not be very coachable.  She is very wary and, as TL mentioned, on her church manners.   Look at the internal contradictions in her testimony.

She was friends (how much is really irrelevant) with TM, was on the phone with him, heard a fight, then the phone goes dead and stays that way.  She finds out later he was dead - killed.  She does not come forward to the cops and instead sits back and waits for them to come to her.  She does not care enough to help the cops sort things out.  When she does get off her duff, it's to talk with Crump.

There are more, but for someone deeply upset by her friend's death, she didn't do a hell of a lot.

The attorney doing the cross was doing a good job of (a) backing her into her contradictions and admitting her lies, (b) kicking open doors to get at all those text messages and (c) breaking down her manners to get the real person out in front of the jurors.  And he's doing it in a very polite, mannerly way that no one can take offense at.

You

I don't care too much about the minor lies Rachel made in her deposition (hospital, age).

But anyone that believes someone that comes forward weeks later at the behest of a defense counsel wishing to sue for millions and stir up racial sympathy....either agrees with the agenda, stupid, or both.

I wonder if you have considered that she may well feel pulled in so many directions, feel so vulnerable to attack or to the kinds of sniping about her appearance we've seen here, that this was nothing more than defensive behavior.  That the pure happenstance of being on the phone with Martin in his last moments sucked her into something she is resisting, and is fearful of.

I think they are afraid to touch it.  

My bottom line now that it is done:  he attitude and way of speaking could easily cut both ways.  The jurors may take a big picture perspective and try extra hard not to let cultural barriers interfere with what their jobs are (which would make her testimony really, really good for the prosecution).

Or . . .

They could look at her as an uneducated young woman that they do not understand and therefore cannot trust.

Personally, after hearing GZ's speaking voice, I can believe it was him screaming. All that sympathy the ex-teacher witness felt for someone in a dire situation could well have been better felt for GZ, up until the last seconds anyway.

She tweeted that RJ's "stint on witness stand like none I've ever seen. Jurors interrupted cause they [can't] hear. Ditto court reporter. Very hard to understand"