Visible crew/equipment: When Susan enters the building's stairwell, in the overhead shot you can see the reflection of the crew or equipment on the banister. It can't be Susan's reflection because she is relatively still, yet the reflection is moving and it is above where she could cast a reflection.
The Grudge (2004)
1 visible crew/equipment mistake
Directed by: Takashi Shimizu
Starring: Bill Pullman, Sarah Michelle Gellar, Clea DuVall, Jason Behr, William Mapother
Other mistake: When Sarah Michelle Gellar is on the bus with her boyfriend, she sees Kayako face looking at her in the window reflection and panics. When she looks back at the window she sees the normal reflection of her face. Trouble is, her reflection is turning her head and looking side to side, whilst Gellar herself is looking straight and not moving her head at all.
Detective Nakagawa: It is said in Japan that when a person dies in extreme sorrow or rage, the emotion remains, becoming a stain upon that place. Death becomes a part of that place, killing everything it touches. Once you have become a part of it, it will never let you go.
Trivia: The Saeki family, the ghost family that haunts and terrorizes everyone who enter their home, are no strangers to the Grudge franchise. They played the same characters in the movie Ju-On, the Japanese version of The Grudge.
Question: How exactly does the father kill the wife? I noticed when she comes down the stairs she comes out of a bloody bag. So how is she killed?
Answer: Another website states that after pushing her down, Kayako sprained her ankle and crawled down the stairs, only to realise Takeo was slowly following her from behind watching her suffer. He then snapped her neck, but she was still alive and could only make the croaking noise. It is also implied that he stabbed her multiple times afterwards, which could explain the bloody corpse.
Answer: Well, in the Japanese original (Ju-On: The Grudge), it shows that Takeo, the father, killed his wife by shoving a knife down her throat or something similar to that. When he was killing her, she tried to scream, except her scream came out all messed up (because the knife hit the vocal chords), which explains the horrible croaking noise. There's no doubt about it that it's the way she was killed in this version.