Rush E began as a joke piano piece by Sheet Music Boss, released on YouTube as the even harder follow up to their earlier Rush B. Built almost entirely around frantic runs and repeated E notes, it became a meme among pianists trying to play it and viewers sharing failed attempts. Remixes later carried it beyond piano videos, and phonk producers reshaped its speed and intensity with bass and cowbell. This phonk segment is one of the later slices shared for edits, memes and short form clips.