Dustin Johnson's fourth round featured the anxiety and pressure that comes with the penultimate pairing of the U.S. Open. But on hole No. 5, Johnson had to deal with an additional distraction because apparently that is what happens with Dustin Johnson at majors.

As Johnson addressed his putt, the ball appeared to move slightly backwards. Johnson did not make direct contact with the ball and he did not ground his club behind it. Nonetheless, Johnson called over a rules official. Johnson pleaded his case to the rules official, who appeared to give Johnson the heads up with no penalty.

But later in the round, Johnson and other players on the course were notified by USGA rules officials that a potential stroke penalty might be enforced after the round. Johnson was on hole No. 12 at the time.

As uncertainty loomed over the home stretch of the U.S. Open, some of the biggest names in golf, including the No. 2- and No. 3-ranked players in the world, Jordan Spieth and Rory McIlroy, took to Twitter to share their dismay with the USGA and the ensuing circus:

Other notables included Rickie Fowler and former champions Ernie Els and Webb Simpson:

Justin Thomas, an up-and-coming American ranked No. 31 in the world, sarcastically tweeted his optimism that he may still win the tournament:

Even Tiger Woods, sitting out the tournament with a prolonged back injury, took a shot at the USGA:

Johnson finished his round with an aggregate score of 265 (-5), clinching the championship by 4 strokes. Even after the one-stroke penalty, Johnson ended with a final score of 266 (-4).

Spieth tweeted a parting thought, applauding Johnson for taking the "high road" while seemingly neglecting his own advice:

As for the mystery of what made the ball move, former World No. 1 Luke Donald may have the answer:

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