A second neighbor, Jeannee Manalo, testified that she also heard screams but did not know who was crying for help. But she was the first witness to testify that she saw a man swinging his arms.
"The one on top was moving," Manalo told the court as she made a punch-like gesture.
But Manalo said she did not know who was punching whom.
The testimony followed a key ruling in the trial by Circuit Judge Debra Nelson to allow jurors to hear several non-emergency calls the former neighborhood watch captain made to police well before the encounter with Martin.
Zimmerman is heard asking during the calls for police to come to his subdivision and check on suspicious strangers, often black. The prosecution argued they should be submitted into evidence because they show his mind-set in the days and months leading up to the shooting.
"The defendant made the calls, he created these tapes, he created these situations. He shouldn't complain," prosecutor Richard Mantei said.
Zimmerman's lead defense attorney said the calls were irrelevant and would confuse jurors, but Nelson overruled his objection today.