>>212629593
He doesn't. He can't DO anything. He floats because he can barely move. Every scene is him just slowly moving towards the characters menacingly then jump cuts and flashes to pretend they're fighting. It looks neat in still images as a spooky concept, but it's an abysmal costume that you all headcanoned into being way better than it was. It's been done 100x better in every following movie and Alien was the worst.