Apparently I am not aware of all internet traditions.
For the last year and a half, there's been an internet tradition involving a 2004 German-language film about Hitler called The Downfall. There's a scene where Hitler goes berserk after being told that Germany can't win, and the gag involves adding English subtitles to change Hitler's rant into a rant about, for instance, the Watchmen movie, or being banned from Wikipedia, or Michael Jackson's death. In fact, it turns out that this internet meme is so old and withered that even the New York Times has heard about it. And yet, I was completely unaware until two weeks ago.
I feel so ashamed.