In my job I have to read a lot of mil specs (military specifications). If you’ve ever dealt with the military, you’ll know they label everything with the most general term first, then the more specific terms, separated by commas. E.g. “Terminal Block, Molded, Screw Type” is the title of a real mil spec. So to me, “Fire, Low-key, Chopped” sounds like a specification for fire. Specifically, a low-key fire that has been chopped.