Miguel Angel Jimenez and Keegan Bradley may have already been eliminated from the 2015 WGC Match Play Champioship by the time they got to face each other in their round robin, but that didn't stop things boiling over between the two (and Bradley's then caddie Steve 'Pepsi' Hale).
Cutting to the chase, Bradley was taking relief from a temporary immovable obstruction, and upon taking his drop, he felt he still didn't have a clear enough swing and so he had to drop again for full relief.
Jimenez came over and wasn't too impressed by the second drop, explaining to Bradley that he could only drop again if the ball rolled more than two club lengths - only he didn't realise there was a fence in the American's way.
Then things kicked off, with the Spaniard telling Bradley's caddie Hale to "shut up".
"I felt like he was being very disrespectful to me – not only me, but my caddie," Bradley said to reporters. "I felt like I had to stand up for my boy here. Me and Pepsi have been through a lot."
Watch the full incident below...