I shot a pretty blah 84 today (it was wet and there were a lot of cranky old bastards slowing me down), but...
I aced the 172-yard 12th hole with my wonderful 6 iron. It was the best swing I can recall making, ever. Just perfect and calm and smooth and easy. It was early, and the grounds guy was doing the bunker on the hole, saw me approaching the tee, had to stop his work, walk 30 yards, and wait next to a tree while I hit, and when it rolled in (landed and rolled about eight fee, like a putt), he started jumping up and down and waving his arms. He was more excited than I was.
This was my second hole-in-one.