I made it up. Here's how it goes: The first person posts a comment, picture, or video. The second person posts something of the same type of comment. The third person says which thing is better and then posts something else, thus becoming the first person.
Diblover111 posts a Dib pic.
woowie posts a Pikachu pic.
InvaderCynder says the Dib pic is better, than posts a Zim video.
Kanji posts a Kei video.
Diblover says the Kei video is better, than posts a comment.
Kanji posts a comment.
woowie says Kanji's comment is better, and posts a Zim pic.