There's very little you can witness that is more satisfying than a dose of instant karma served up to someone who truly deserves it.
Whether the recipient is being rewarded for their goodness or punished for acting like an a-hole, it used to be extremely rare to witness instant karma being handed down from on high.
But thanks to smartphone and GoPro cameras we have documented video proof that karma exists, and the moral of this particular video lesson is "don't be a jerk or karma will get you".
(Contains NSFWish material and terrible music, viewer discretion is advised)