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Golden State Warriors coach Steve Kerr seemed frustrated in the third quarter of Game 1 of the NBA Finals against the Cleveland Cavaliers on Thursday. How could you tell? Well, he broke his clipboard into pieces with his fist during a timeout.

Watch:

Kerr was annoyed for two reasons. The Cavaliers were in the middle of the run that erased the Warriors' 14-point lead, and Cleveland big man Tristan Thompson appeared to get away with a foul.

The smash was pretty impressive, though, wasn't it? That was a nice, clean break from the Coach of the Year.

Steve Kerr smashes a clipboard
Steve Kerr smash! ABC