Fortissimo comes from classical music notation, where the Italian word and its ff marking tell performers to play very loudly, stronger than forte. Composers have used the direction for centuries to mark climaxes in symphonies, film style orchestral writing and dramatic passages. Online, editors borrowed the idea as a standalone clip for jokes about scale and importance, dropping the loud orchestral blast over moments that do not deserve it. That contrast between serious musical force and silly visuals is why the sound keeps circulating in meme edits.