Visible crew/equipment: During the scene where the Geckos first enter the Titty Twister, right after the shot where Seth takes the bottle of whiskey and glasses from the bar the camera cuts between shots of the bar, right after the band finishes the song a camera is visible in the lower right corner. (00:50:25)
From Dusk Till Dawn (1996)
1 visible crew/equipment mistake
Directed by: Robert Rodriguez
Starring: George Clooney, Harvey Keitel, Salma Hayek, Juliette Lewis, Cheech Marin, Quentin Tarantino, Danny Trejo

Revealing mistake: When George Clooney is talking to Juliette Lewis towards the end of the film, it is painfully obvious that his tattoo has been smudged. (01:40:35)
Jacob Fuller: He's my son.
Seth Gecko: Oh yeah? How does that happen? You don't look Japanese.
Jacob Fuller: Neither does he. He looks Chinese.
Seth Gecko: Oh well, excuse me, all the hell.
Trivia: Sex Machine's 'crotch gun' is used in Desperado, which also stars Quentin Tarantino and Danny Trejo (the barkeeper).





Answer: Because he is a sadistic lunatic and he wanted to. He has a lot wrong with his brain, paranoia, psychopathy, hallucinations, sexual predation. Probably more. He is a deeply disturbed individual and killing Gloria gave him pleasure.
lionhead