It started with a swipe by Jason Terry. It ended with Terry being held back from going after J.R. Smith.
In between, Smith retaliated with his right elbow, one that caught Terry square in the face and drew a Flagrant-2 foul from the referees. That meant an automatic ejection for Smith, and could have repercussions for Game 4 on Sunday, when the Knicks will try to close the Celtics out after a 90-76 win on Friday night at TD Garden. The win put the Knicks up, 3-0, in the first-round series.