I love buzzer beaters, especially when they are made by the Celtics, of course it's worth its own thread, I really can't get tired of watching it again and again!
Here is an alternative version (HD and with Tommy and Mike's comments) :
http://www.youtube.com/watch?v=pLreDpiILtkWhat cracks me up even more with buzzer beaters is the reaction of the winner's teammates just after the shot, or in the huddle. There are always some funny events (see Davis, Glen and the shoved kid last year) and their joy is just communicative.
Funny to see Gaffney being so pumped up while he has been with the team for like 10 days. Nate is going bonkers too, and I love the reaction of all the C's who where on the court with Pierce (Ray rushing to Paul, KG with his fist pump, Rondo and Finley celebrating but remaining "stoic").