You knew this was coming.
Why did the Celtics go 2-7 after starting the season 27-2?
Easy. The loss to the Lakers did a number on their psyche.
Why are the Celtics 8-0 since going through their slide?
They are gearing up for the 2/5/09 rematch.
This blog has also argued that one reason the Celtics started the season on fire was because they were determined not to listen to how great the Lakers were for the first two months of the season. So they decided to steal some thunder from the purple and send a little message of their own to the Left Coast.
The motivation for their most recent hot streak is similar. The green understands that they need to be playing very well to win on 2/5, and so they better start ramping up early.
It's a green and purple world everyone.
It's sad how much I can milk one topic.