Watch: Dustin Johnson's drive carries 321 yards

Few things are better than watching Dustin Johnson melt a drive off the tee with the aid of Protracer.

On the par-5 18th at Kapalua, Johnson unleashed a drive that carried 321 yards and finished 345 yards down the fairway.

The current U.S. Open champion would birdie the hole for a round of 69.