Rewind to five years ago when the PGA Championship was last held at Whistling Straits. What do you remember more clearly? Martin Kaymer hoisting the Wanamaker Trophy after beating Bubba Watson in a four-hole playoff? Or Dustin Johnson pushing his drive way right on the 72nd hole and his ball ending up in a sandy area — which had been trampled by thousands of fans and even splattered with trash — where he grounded his club and received a two-shot penalty that took him out of the playoff? Probably the latter, unfortunately.