>> we're going to sit and not talk. >> reporter: four minutes of silence ticking by to show the jury the length of time marten had to escape after he spotted george zimmerman watching him. >> that's how trayvon martin had to run. about four minutes. >> reporter: instead of running, o'mara said martin decided to confront zimmerman and used a 3-d animation that shows martin punching zimmerman in the nose. >> there's the shot to the nose, we contend. >> reporter: a repeated tactic by o'mara in the courtroom, outright disbelief of the prosecution's case. >> seriously? really? really? come on. really? i almost wish that the verdict had guilty, not guilty, and completely innocent. because i would ask you to check that one. >> reporter: the prosecution delivered a strongly recorded rebuttal saying trayvon martin's blood is on george zimmerman's