It started with the top image. An artist called Blue posted a drawing of a Black Widow and Hawkeye cover with the poses swapped. Blue then issued a challenge to other artists: replace the female characters in other comics with Hawkeye. These are just a few examples of what happened next.
(Warning: Contains a lot of strong language.)
Max Landis, writer of the new movie "Chronicle," gives an accurate (and mildly drunk) retelling of 1992's "Death of Superman," with help from Elijah Wood, Mandy Moore, and other surprise guests.