If you aren’t familiar with the “Mitochondria is the powerhouse of the cell” meme (complete with its subject-verb disagreement), you probably haven’t spent enough time on the internet, but it will be easy enough to find a
description of it. Anyway, this piece has a lot of power chords and a heavy rhythmic groove, which is probably what mitochondria would sound like if they weren’t so busy powering everyone’s cells and memes so they could play this piece.