San Antonio Spurs head coach Gregg Popovich is the ultimate perfectionist — so when he caught an errant swing pass from forward Danny Green during the team's game against the Boston Celtics — he wasn't very thrilled.

https://vine.co/v/5FilZUb9zJg

Heads up, coach!

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There it is, the priceless look of a disappointed father if I've ever seen one.

Green played 32 minutes in San Antonio's 109-103 win over Boston, so it wasn't like he was punished for that blunder. But a few of those will sure land him in Pop's doghouse.

Spurs beware.