Dammit, I knew we should have used Chatroulette!
Gordon Scott Pleasants, a college professor of criminal justice, was just trying to deliver his testimony via Skype about how George Zimmerman once took a criminal investigation course. Unfortunately, dozens of people seized the opportunity to obstruct justice by bombarding Pleasants's Skype account with phone calls while the judge beseeched attorneys to shut the whole damn thing down.
We assume the Skype call was eventually disconnected, and Simmons delivered the rest of his testimony via a 732-part series of Vine videos.
Sources: The Smoking Gun