[DustyPorViva]

More concept. Pretty self-explanatory, body walking upside down with another body attached to its torso. One arm is attached to the bottom body's leg, so only its other arm with the claw is usable.

EDIT: another concept. Walls that come alive as the player passes them. Accompanied by a sudden shriek.
EDIT2: another concept. Guy with boulders in place of hands.