BOSTON — At halftime of Game 1 of the Eastern Conference finals, things looked pretty darned good for the Boston Celtics. They’d controlled the paint, taken care of the ball and made shots, and as a result they had a 66-57 lead over the Miami Heat 24 minutes into this best-of-seven affair.
Then the third quarter started. And, yet again, the Dr. Jekyll version of Boston disappeared and the Mr. Hyde…