Bioshock certainly had its attention grabbing moments, but FEAR certainly cleared my bowls more than once. Specially the bits where you'd get a ghost or that scary be hatch of a girl charging at you in the vents. Oh and not forgetting the ladder incident. You approach the ladder, turn to go down it - Girl standing right in your face - PARRRPPP climb down the ladder, turn Blokey Dude in your face PARRRRPP PFFTTT Wet and warm undies for me 
