I had a good laugh at this, perhaps not what you intended though.
feels a little…broken to me. Giving shape to what struck our character might have ruined the dark nature of the scene for me. Since there’s nothing else affecting the scene, leaving the nature of the attacker open to your readers imagination might have more impact.

OK, Night, thanks for the feedback! Let me try to make the attacker even more formless.

Very effective. Lots of questions and possibilities, but this little bit puts us squarely in your protagonist’s very frightened shoes.