It can be awfully difficult to putt when you're playing golf in a downpour. Water collects on the greens and you can find yourself putting through puddles. It's no fun.
But you know what would make it fun? Having a buddy there to sweep away the water as your putt rolls toward the cup. That's what these guys did, using a big broom like you would on a curling court to push the water out of the way and clear a path to the hole.
Then the ball goes in and, like most happy golf videos, ends with the whole group going bonkers.