Not his Day: Jason makes an absolute mess of the 18th hole

As he cruised along at 4-under par for the tournament, it appeared Jason Day would have a chance for the third straight year to win the PGA Championship.

Then, the 2015 winner lost his damn mind on the 18th hole at Quail Hollow, walking off with a quadruple-bogey 8 and effectively ending his chances in Sunday's final round.

So how does a player of Day's pedigree balloon to such an awful number?

Let's take a look:

'You are kidding me'

It began with a tee shot pushed way right on the par 4, leaving him a very difficult lie behind a narrow tree, sitting in pine straw. While most players would simply chip back to the fairway and take their medicine, Day opted for a more cavalier approach. The Australian tried to hit a sweeping hook around the trees, over the crowd, and back onto the fairway, prompting CBS analyst Nick Faldo to exclaim, "You are kidding me!" It didn't go as planned.

'I don't know how he plays that shot'

Day's ball came to rest lodged in some shrubs, leaving him no choice but to take an unplayable lie and drop his ball in a better place. That prompted a lengthy discussion with a rules official over where he could place the ball far enough away from the grandstand behind him. Day finally found a spot, which led CBS Host Jim Nantz to say, "I don't know how he plays that shot." Day eventually took the shot just a couple feet from a number of port-o-johns, a fitting image for the stench surrounding his decision-making on this hole.

'This could be 7, could be 8, something crazy'

Day actually made clean contact on the ball, lifting it over the trees and back toward the fairway. Unfortunately, it fell short and nestled into an atrocious lie in the rough. The prospects from there weren't good, and the CBS team quickly offered some foreshadowing with the comment, "This could be 7, could be 8, something crazy."

'Give the man a break'

After hacking out of the rough and chipping up to the green, Day was left with a 10-footer for a triple-bogey 7. The 29-year-old struck a solid putt, but lipped out hard, leaving Nantz left to beg, "Give the man a break!" Day fell from fifth into a tie for 16th with the quadruple-bogey 8, and sits seven shots off the pace heading into Sunday's final round.