Waving back is the polite thing to do.
Some idiot attempts the deadly knockout game on an innocent girl walking in the mall. What happens next is instant Karma!!!
Is this a fail or a win? Either way, it's one of the best slow motion knockouts I've come across.
First time I've ever seen something like this. EPIC Win!
If you throw a punch you better be prepared to take a punch.
Almost uncomfortable to watch...
This guy figured out what hotel Justin Bieber was staying at in Boston, walked out the entrance, and proceeded to troll.