Is This The Biggest Cheapshot Punch Ever Thrown?

The fans of Australian football teams Melbourne Heart and Western Sydney were chanting at each other at a game over the weekend when one rogue fan did this.

http://www.youtube.com/watch?v=JA0kPXiMJVk&feature=player_embedded

Such an unfair cheapshot that could have badly injured the recepient.

h/t 101greatgoals