Selecting the sound was (in my opinion) the hardest job, as there was no “perfect” sound that matched the sequence.
One day whilst editing, the song Cradles by SubUrban auto-played on YouTube and it was a match!!! Not only the beat of the song but also the lyrics matched the story of the opening sequence.
Once I added the song, I reduced its speed by 13 percent and cut out the first 8 seconds of it just to match the beat drop with the scene when the antagonist comes behind the protagonist.