3: Making Peanuts Slightly Worse

Explanation
In the original, Charlie Brown states that there is "nothing more upsetting than the clobbering of a cherished belief" after the Great Pumpkin fails to show, disheartening Linus. In this edit, his line is instead changed to a running gag from Making XKCD Slightly Worse, which is, as TV Tropes puts it, "to xkcd what Square Root of Minus Garfield is to Garfield."

The author writes
Am I too late for an XKCDSW joke?

Original Peanuts strip: 1960-11-01

Transcript
Linus: I believed in the "Great Pumpkin"! I really did!<br Linus: I believed in the "Great Pumpkin" with every fiber of my being! Linus: Rats! Charlie Brown: Well, it's better than Vista. Snoopy: True.