I don't know why Mr King decided to defend himself - this is usually a terrible idea, and it also tends to irritate judges. But he'll almost certainly get a retrial, although on the facts of the case he'll probably be convicted anyway. Although it's hard to evaluate the judge's action without knowing all of what went on beforehand, I've only ever heard of physical shocks being used to restrain unruly or violent defendants, not ones who just try to talk over the judge.
I remember the tire deflation bit from the Washington Post. I'm not sure why Nailey is still employed as a judge.