One day, when I was playing Subnautica and going about my business, I came across some very strange stalker... Interesting, it's a planned joke from the developers? Or did his script just work incorrectly?
All of the subnautica creatures that you start to find in the beginning spawn in the air, and all of them try and go to where they spawned. You rendered in the stalker really fast so you "saw" him as a chunk. And he was obviously going to his starting point.