The lyric comes from Never Gonna Give You Up, released by Rick Astley in 1987, which later became the centre of Rickrolling, the bait and switch prank where a promising link leads to the song instead. That meme spread widely online in the late 2000s and never fully disappeared, returning in remixes, edits and short form videos. This version shortens the familiar setup and replaces the expected chorus continuation with a gunshot, keeping the recognition of the original while using the interruption as the whole payoff for modern meme edits.
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A Rickroll remix of the Never Gonna Give You Up lyric you know the rules and so do I, cut short by a sudden gunshot for bait and switch edits.
This clip takes the familiar opening of a Rickroll, with the sung line you know the rules and so do I from Never Gonna Give You Up, then interrupts it with a sharp gunshot. The singing is smooth and instantly recognisable, which makes the sudden bang feel even more abrupt and absurd. That contrast is the joke, turning a nostalgic pop moment into a quick shock punchline. It works best as a short, unexpected break in a video where the viewer expects the song to continue but gets a hard cut instead.