In Elden Ring, at the Shaded Castle, there is a Revenant hidden under the poisonous water. It comes out only if you approach it and attacks you. If you go on the roof of the nearby building, close enough, stealth, the Revenant will come out and stay there motionless, waiting for you to approach it.

This scared me, knowing what the enemy does, and knowing that I have to go there and fight it, seeing it just sitting there making that heavy breathing noise, waiting. (I attacked it from afar, and it teleported behind me spitting venom, killing me instantly lmao, me being like "oh shit oh shit oh shit").