Continuity mistake: O-Ren shot the dart from where she was sitting in the private dining room at the restaurant. Since we see the dart travelling in a straight line past the kneeling Bride's face, the dart somehow manages to stop at eye level when Go-Go retrieves it.
Continuity mistake: When Uma Thurman is standing in the kitchen talking to Nikki, the position of the strap of her knife holster rides up and down her thigh between shots.
Visible crew/equipment: When Vernita Green dies in the kitchen, during a close up, we can see a bright light reflected off the sweat on her neck. This is a crew light, as all the other light in the room is natural, coming from the window facing the other way, so it couldn't be reflected.
Revealing mistake: When the Bride takes a slash at Buck's heel, you can plainly see that there is a fake heel there. She definitely cuts through the sock, so it's not the sock pattern, and there is no blood.
Continuity mistake: When O-Ren's young bodyguard has the mace, she hits the Bride smack in the chest more than once with the very heavy, spiked ball. But later, there is not a trace of a welt, bruise, or cut on the Bride's chest (plenty of blood on her half-zipped jacket but her skin is just fine.)
Continuity mistake: Oren is in the back of a limo, with all six motorbikes ahead of her, after the final two have moved up from the back to the front, but when we see a shot of Oren, in the limo, there are four headlights behind the limo, the way it was before the bikes moved up.
Continuity mistake: In the fight scene between Gogo and The Bride, keep your eye on the ball and chain weapon. It spins in different directions depending on the shot.
Other mistake: At the end when The Bride cuts off the top of O-Ren's skull she somehow manages not to cut through the brain underneath.
Continuity mistake: When The Bride and Vernita Green are in the kitchen, Vernita mentions something like "I've got to fix my daughter's cereal." Notice when she says this, The Bride is holding her mug with the handle facing Vernita, when the shot changes, it is instantly facing The Bride - something which cannot be achieved this quickly.
Continuity mistake: The Bride's face gets beaten up with visible marks during the fight with O-Ren's last female fighter. But after the fight her face is back to how it looked before the fight.
Continuity mistake: The Bride cuts off both of Sophie's arms, but when she throws her into the hospital, she has one arm. (This mistake is only seen in the extended Japanese version of the film - in other versions only one arm is cut off).
Continuity mistake: Tanaka's severed head lands on the table and stops rolling, meaning it should stop moving. However, it then falls off the table.
Continuity mistake: In the Crazy 88 fight, when The Bride stabs a bald Crazy 88 member, at first the sword is to the left of his tie, but when we see a closeup, it's to the right of it.
Answer: Bill used Hattari Hanzo's teachings for evil, instead of belief and self defense.