OAKMONT, Pa. -- It's difficult to describe what it feels like to stand on the tee next to Dustin Johnson and watch him hit a golf ball 350 yards, but here is the best metaphor I can come up with: Imagine if you saw a lumberjack who just walked out of Gold's Gym grab a 50-pound sledgehammer, whip it over his head, and split a bowling ball in half. That's what it feels like. I'm not joking when I tell you the sound of impact stings your eardrums a just bit.
On Friday at the U.