So I've recently scoured the internet; steam community, this wiki, game theorists, any source I could find, and still I have no information on one part of Resident Evil 4. Right after the fight with U-3 you encounter a flying creature next to the ladder leading to the next area. It can only be hit once before becoming invincible and flying off. It isn't referenced in any file, it is the only enemy of its kind, and it never reappears after that one scene. Does anyone have some theories on what it is?