Rush E began as a viral piano piece by Sheet Music Boss, created as an impossibly difficult follow-up to Rush B and built around a relentless repeated E note. Players and animators turned it into a meme about unplayable music, with videos showing keyboards smoking and hands moving at inhuman speed. Phonk producers later remixed the melody with heavy drums and bass, and those edits spread across TikTok, YouTube and gaming communities, keeping the joke alive in a louder, more aggressive form.