That is mainly because Celtics somehow managed to put their best players down for a rest on third quarter and Miami didn't. Celtics coach probably assumed that Miami would too, but they didn't and while Brown was resting, Heat took a great lead and then it wasn't that hard to finish the rest. I keep telling people that NBA head coaches are not as great as you think, sure some of them are, a few, like Pop is the best ever, but usually they are not.
That's a mistake that Joe did and with that throwing of the clipboard, he should show that he's chill to boost the morale of his players that this game is theirs. But having that reaction, that has caused a domino impact, and these players even at their greatest shapes, mentally they'll surely be affected.
Why are they there and not us? Because we didn't pick that life when we were young, look at their CV and you will realize they are there because they paid their due. But when you talk about talent, I am sure that there are a lot better armchair coaches that can do better job than what celtics coach did last night.
Yup, and that's why some of them were already kicked and we might see another one being fired after losing this conf. finals. And from the lowest of the coaching staff, there goes the discovery of some talents that they can do better than of the headcoaches.