The it's a bird, it's a plane line comes from early Superman stories, where onlookers tried to identify the hero flying above them. Online creators later reused the setup for parody reveals, swapping Superman for anyone or anything unexpected. With PewDiePie, shortened by fans to PDP, the joke grew in gaming and meme edits linked to his huge YouTube presence. Versions are shared as short soundboard clips because the structure is instantly recognisable, the misdirection works without visuals, and the payoff can be dropped into almost any entrance or reveal.