My favorite was during the Cleveland series at home, I'm not sure which game it was. I believe it was Game 2.
The ball was loose and guys were all over the floor, including KG. Well somebody got a hand on the ball, KG ran the floor, got half court pass and just jammed it home. It basically put together all the elements of the 07-08 Celtics; Tommy points everywhere, great passing, KG dunking all over - Team Basketball. ANDDDD... The Garden went crazy.