Oosthuizen's tee-shot on the 583-yard first hole at Blackstone Golf Club was pushed right of the fairway and bounced onto a winding cart path running down the side of the hole. It then rolled downhill for more than a minute and a half, picking up speed after almost coming to a halt at one point and rolling past two confused spectators before coming to a halt against a curb around 500 yards from the tee — or nearly a third of a mile away.
From there the Big O took a free drop and pitched back onto the fairway, eventually recording a par five on his way to a round of 71 and four-under-par halfway total of 140.
It is still not known whether Oosthuizen's drive ended up further than the previous longest hit in tournament history - courtesy of 64-year-old Mike Austin, who hit 515 yards on a 450-yard par 4 in Las Vegas.
Enjoy the Happy Gilmore moment.