The 2007 Masters champion was in the middle of the pack as he wound his way through the back nine, after scoring a 74 in the opening round.
The extraordinary incident became even more weird once the ball had richocheted off the tee marker and come to rest only a couple of metres away, still on the teeing ground. So Johnson re-teed and found the fairway. A less experienced golfer may have been rattled after something like that happened, but Johnson seemed unfazed.
The rule in question is Rule 6.2b 5.
"Okay, there's a first for everything there boys", Johnson said, relieved.
However, he got far too close to the ball itself, and brushed it off the tee with his driver. I thought I had done it all but now I know I've done it all.
Zach Johnson, a two-time major victor who won the green jacket in 2007, just shanked a shot at the par-5 13th.
Johnson then awkwardly stepped up to pick up his ball, looked around at his playing partners to see their reaction, and then took another whack at it.
The 43-year old was not assessed a penalty and the shot did not count as a stroke as Johnson had no intention to hit the ball.
Both players ruled the contact incidental and Johnson, who finished at 3-over, would not be given any penalty and he would go on to birdie the hole.