I have been following the case by internet video feed. At Legal Insurrection guest poster Andrew Branca comments:

A neighbor, John Good, who witnessed the fight between Trayvon Martin and George Zimmerman has just devastated the State’s case, testifying that he saw the fight between the two, that Trayvon was on top punching Mixed Martial Arts style, and that the scream must have come from Zimmerman because Zimmerman was on the bottom and Trayvon was faced away from the witness.

Which is pretty consistent with the defense position.

Note that the TV commenters at the video link are sure the prosecution is winning the case.

A person (Internet friend) who lives in Sanford reports:

Argument between white lady and black lady : Do I have to draw you a friggin’ picture?? Can you NOT see the gashes, the egg-sized lumps, the bent, swollen and twisted nose, and now you have a witness who has been consistently stating, no matter howya twist it, the guy in the DARK HOODIE was on top!! His arms were in motion over the guy in the RED on bottom!!! We KNOW who that was!!! Now, whatr’e y’all gonna say? That Zimmerman stole the dark hoodie and dressed Trayvon in Red???

Black woman. Fuck you, you nasty-ass cracka ho!!!

Riots if Zimmerman is acquitted? I’d bet on it.