While I am certainly aware that "past history is not indicative of future performance", I provide you with this interesting stat:
For the recent NBA playoff past, No. 1 seeded teams (as in your Boston Celtics) playing AT HOME when the series is tied, now stand at 20-3.
(This includes the C's two wins @home vs. Atlanta when the series was knotted up 2-2 and 3-3).
Tonight, both Boston and LA fit this historical profile.
Let's Rock the Garden tonight!