1997 playoffs - Miami vs. N.Y. Late in game 5, Charlie Ward undercut P.J. Brown while both were attempting to rebound a free throw. A brawl ensued, several Knicks left the bench & were suspended. Van Gundy came onto the court - claimed he was trying to stop the brawl - ended up hanging onto one of Alonzo Mourning's legs.
I'm sure someone can come up with a video for this. I'm too tired to look for one.
edit - Knicks lost the series - probably because of the suspensions.
It was the 1998 play offs
It was LJ vs Zo and there was bad blood between them from their Charlotte days together