One bit in Bioshock... there's water on the floor, it's a small room and on the wall I can see the hulking shadow of a splicer. I reach for my trusty shotgun and move stealthily forward.
And the lights go out.
Through the impenetrable darkness I can hear nor see anything then I hear the water swishing to my left, just within an arms reach. I loose off my gun several times but hit nothing, I hear a slight laughing behind.
The lights come on.
I turn around, nothing. I edge round the corner and see a dessicated corpse of a woman on an undertaker's slab, her stomach ripped out and blood sattered on the floor. I turned around.
And the lights went out.
And then they come on again.
And the nobhead was right in front of me! Scared me absolutely shitless, I must have jumped a mile.