When Chiaki Kuriyama (Gogo) was shooting the scene where she flings her ball and chain out, she accidentally hit Quentin Tarantino on the head as he stood by the camera.
The shot where the Bride splits a baseball in two with a samurai sword was done for real on the set. It was done by Zoë Bell, Uma Thurman's stunt double.
Quentin Tarantino originally intended to cast a Japanese actress to play O-Ren Ishii, but before casting began he saw Lucy Liu's work in Le cowboy de Shanghaï (2000) and immediately changed O-Ren into a Chinese-Japanese-American so that Liu could play the part.
The Bride's yellow outfit was inspired by the outfit worn by Bruce Lee in his final film, Le jeu de la mort (1978).
According to Quentin Tarantino and Uma Thurman in the DVD documentary, the idea for doing "Kill Bill" began during the filming of Fiction pulpeuse (1994). The two began talking about the kinds of movies that they would like to do, and Quentin said he would like to do a 70's style kung-fu flick. Uma came up with the film's opening shot of her beaten up and wearing a wedding gown.
Quentin Tarantino: When The Bride stands over the remains of the Crazy 88s, a masked Quentin Tarantino is among them.
Quentin Tarantino: [Long Take] After The Bride leaves O-Ren's door at the House of Blue Leaves (when Go-Go returns inside) the camera follows her down the stairs through the bar, past the kitchen, and into the ladies room. Then out of the ladies' room, back to the stairs, and follow Sofie Fatale along the exact same path to the ladies' room, ending with the ring of her cellphone. The shot is done in a single, unedited take.
Quentin Tarantino: [Red Apple cigarettes] When the Bride arrives at the Tokyo airport, she walks in front of a Red Apple cigarettes advertisement. Red Apple is a "Tarantino brand," one of several fictional products that are often seen in his films. Julie Dreyfus (Sofie Fatale) is the Red Apple model. In real life she was a model for various ad campaigns.
Quentin Tarantino: [Bare feet] Lucy Liu is barefoot as she runs to kill Boss Tanaka. The band at the House of Blue Leaves is barefoot. The Bride is barefoot as she escapes from the hospital, and tries to regain control of her legs.
Quentin Tarantino: [cereal] The pistol that Vernita Green (Vivica A. Fox) fires at The Bride (Uma Thurman) is hidden in a box of "KaBoom" cereal.
Quentin Tarantino: [Trunk Shot] While The Bride is interrogating Sofie Fatale, we see from Sofie's point of view inside the trunk of her own car looking up at the masked Bride.