If you've got enough skill and balls big enough for the task, then this is the only way we want to see tailgates being closed in future.
Aptly named 'Shutting A Tailgate Like A Boss', this biker rides up to the pick-up's rear on his front wheel, spins the bike around and lands the rear tyre on the edge of the tailgate. With a flick of his wrist, the rear wheel spins up and closes the tailgate. Boss!
Hat tip to Ben H!