Rush E grew online as a shorthand for impossible speed, with the melody reused in countless short videos, reaction edits and gaming clips whenever something moves too fast to follow. Its association with Markiplier-style playthrough humour helped it travel beyond piano fans to a much wider meme audience, where the joke is not the music itself but the frantic rush it signals. Because the tune is instantly recognisable even in a one-second burst, creators keep returning to it for last-second scrambles, speedruns and overloaded schedules.