Celtics got crushed by the Wizards in game 4 on Sunday, it was ugly, and a Wizards fan decided it was a good time to heckle Isaiah Thomas, but I.T. had some pretty strong words for the heckler and it's all on video!

I have no idea what the fan said to Isaiah, but I 100% know what I.T. said to the fan!

Game 5 is going to be brutal. These teams HATE each other and now the fans are starting to get involved. The rest of this series is going to be messy.

LET'S GO C's!!!!!