NBA referee Joey Crawford was seemingly caught on video telling a player to “shut up” in a furious tone during Game 4 of the NBA Finals on Thursday.

After being called for a foul, Cleveland Cavaliers center Timofey Mozgov approached Crawford, assumably to argue against the call. However, the famous NBA ref unexpectedly exploded on the player.

“Do me a favor and shut up!” Crawford apparently replied, according to Bleacher Report.

The Golden State Warriors were leading the Cavs 80-70 with 10:15 left in the fourth quarter on Thursday. The Cavs lead the series 2-1.

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