The birds were flyin' at Madison Square Garden on Tuesday ... all thanks to diehard Knicks fan Tracy Morgan, who couldn't help but share his frustrations with Sixers star Tyrese Maxey by giving him the finger!!
The hilarious (not so much for New York fans) moment went down in the closing seconds of the Knicks' Game 5 matchup against Philadelphia ... when the former Kentucky Wildcat pulled up from behind the arc to tie things up at 97.
The shot completed the Sixers' late-game push .