One moment, please http://www.batimmobilier.ch/en/alpha-brain-reviews-2014-9c0d.pdf#strait alpha brain waves study  The motion-capture animation was a snapshot of what the defense said happened the night Martin died. The animation shows Martin walking up to Zimmerman and punching him in the face, as well as Martin straddling and punching Zimmerman. It was built using Zimmerman's account of what happened and estimations made by witnesses who called 911 about the confrontation the night Martin died.