I remember seeing it on TV.  It was in colours. I saw this boy finding a bloody knife behind a char in some kind of living room. He sees a door open leading in to a bathroom. He goes in, and he sees this woman. It was only her head. The rest of her body was gone. Her head was floating in a bathtub filled with blood. She turned her head and looked at him as she said “can you see me?” in a shaky voice. Can someone please tell me what movie this is?