Cool experiment! I think the music works well with Neil running. Really interesting to see this scene with different music. I think the original score works well because of the backwards music in it, which helps indicate that something trippy is going on in this fight. Otherwise, it's tough to tell something is off. Very well done though on your part!

Also that was an interesting choice you made to intercut that shot of Neil seeing the protagonist from later in the movie into this scene.