Watch: Thomas trolls Portis from sideline following offensive foul

In case Bobby Portis of the Chicago Bulls didn't understand that he was getting whistled for an offensive foul Friday night, Boston Celtics All-Star Isaiah Thomas made sure the call was crystal clear from his team's bench.

Thomas' trolling skills were on point at the United Center as the Celtics, up big on the scoreboard in the first half, look at an opportunity to end their series with Chicago in six games.