Phil Lesh of the Greatful Dead Breaks Out a Surprise Jam in Central Park [VIDEO]Phil Lesh of the Greatful Dead Breaks Out a Surprise Jam in Central Park [VIDEO]Founding Greatful Dead member Phil Lesh showed up in New York City's Central Park unannounced over the weekend with a few friends. Check out his impromptu jam session:Rich LedouxRich Ledoux