Who saw that coming? Tiger Woods, golf's ultimate closer, out-duelled on a Sunday by a 37-year-old farmer's son who rarely stays around for the weekend at the Majors - yeah right.
But happen it did. And while Yang Yong-eun was busy lifting his bag over his head in cartoon-like celebration, the world number one did a passable impression of a jilted teenager watching somebody else dance with his girl.
Never before had a red-shirted Tiger lost out at the Majors after taking a lead into the final round. Never before had he misread so many short putts. And never before had he looked so vulnerable, so exposed, on golf's biggest stage.
Yang's victory was as emphatic as it was unexpected. Having gone ahead with a chipped-in eagle at the 14th he stuttered just once - at the 17th - but regrouped to birdie the last and resign Tiger to a crushing three-shot defeat.
As the first Asian man to win a Major championship, Yang will dine out on this victory forever and quite possibly inspire a generation to follow in his wake. But like the three Majors that came before it, this year's US PGA Championship will be remembered for what could have been.
Tiger's defeat has predictably prompted many to question his credentials as a genuine threat to Jack Nicklaus's haul of 18 Major titles. "He's not the player he once was," they're saying. "He might not get there after all."
But they're wrong. Tiger has returned from major surgery this year to win five tournaments and finish in the top six at the three of four Majors. That's hardly the form of a man in decline.
Moreover, he's swinging well, hitting it miles and has lost none of the phenomenal desire that will ultimately see him past Jack's mark and beyond.
And it's not the first time in his career Tiger has gone 0-for-4 at the Majors. After winning the 2002 US Open he went 10 big ones before donning the green jacket at Augusta three years later. And I seem to remember him doing pretty well after that.
Then there's the 2010 Majors calendar to consider. After Augusta, the US Open lands at Pebble Beach before the world's best park up at the home of golf, St Andrews. Now there are two courses that Tiger rather enjoys.
So don't be surprised if the big cat returns for the best year of his career in 2010. Grand Slam anyone?
FIRST PUBLISHED AUGUST 2009