CHAPEL HILL — He doesn’t mean to do it. He snaps. One bad possession, one missed defensive rotation and suddenly, Jonathan Powell is tearing at his practice jersey, fabric ripping down the middle, and emotion flowing.
It’s not a tantrum. It’s combustion.
“I have a flip [of a switch] every time I get on the court,” said Powell, who, like every player, wore practice jerseys for Saturday’s Blue-White scrimmage. There was no ripping of his jersey, though. “Like a little switch I can flip on and off.”…