Continuity mistake: In the final battle, Jacob turns into a vampire and bites Scott, when Scott hits Jacob with the holy water bomb, Jacob backs away from Scott, when Jacob removes his mouth from Scott's neck, there is no blood on it, two cuts later, there is blood on Scott's neck.
Continuity mistake: When Jacob gets bitten, he is thrown across the room by Sex Machine. If you look closely as he's flying through the air, you can see the wound on his arm has disappeared.
Continuity mistake: In the shot where we see the bar (for the very first time) they are going to, you can see the background is flat, kind of like the building is on a flat area of land with nothing behind it. At the end of the film we see not only a giant ditch but also the trucks from over the years piled up behind the bar.
Continuity mistake: During the scene when Seth questions why the bartender will not serve him, several camera shots go to the band on stage You don't even have to watch carefully to know the band, especially the drummer, are not playing their instruments and/or their miming is way off.
Factual error: The Abilene, Texas courthouse should read Taylor County Courthouse, being that Abilene is the county seat of Taylor County, Texas. All Texas courthouses are named by the county they are in.
Continuity mistake: In the hotel when the manager comes through the door, in the first shot the door is open, but the next time the door is closed.
Continuity mistake: Frost gets green blood all over his hand after holding the vampires heart, but this disappears while they are fighting the four women. After the fight finishes, the blood returns.
Continuity mistake: When Frost drops the first of 4 vampire waitresses/dancers onto the legs of an upturned table, he drops her belly first but she lands on her back. There doesn't appear to be enough time for her to turn over in mid air and land perfectly on her back.
Continuity mistake: When it shows a shot from the front of Seth, Kate and Scott running from the bats, some bats catch up with them and fly past them. But in the next shot from the back of them, no bats have flown past.
Revealing mistake: Shortly after passing the border Seth is talking to Jacob who's supposed to be driving. But the reflection in his glasses shows that they don't move.
Continuity mistake: Right after Salma's dance, Chet, the bartender and another big guy walk up to Seth and Richie and accuse them of kicking him and breaking Chet's nose earlier. One of Chet's men then stabs Richie's hand as Seth pulls out his revolver and shoots one of the other men. It is obvious and easy to tell that the bullets supposedly hitting the men aren't causing any kind of blood or damage, etc. In fact, it almost seems they are blanks.
Continuity mistake: The scene where the vampires in the Titty Twister bar start devouring the customers. George Clooney confronts Salma Hayek. She taunts him and he shoots her. When he does this the jacket falls open to show he is wearing a white shirt underneath. However, when she comes back to life a couple of seconds later and punches him to the ground, his jacket falls open again - only this time it is a completely black shirt underneath.
Continuity mistake: At the end when Seth drives away, we see Kate holding a bunch of money in both hands. The camera angle changes and now both hands are her hips, no money in hand as she walks away. In fact we see no money on her in any way. Where did the money go?
Other mistake: This mistake is actually about the DVD box art. On the cover, George Clooney is pointing his revolver outwards. A revolver has rear and front sights, but if you look at the front of the barrel of the revolver you will see the rear sights and front sights both there. The rear sights are supposed to be on the backside of the revolver, but on the cover the rear sights are actually in front of the front sights. No revolver works like that.
Continuity mistake: When Richard bends down to pick up the keys in the motel room, we get a shot of Kate's painted toes. Later in the RV, her toes aren't painted.
Revealing mistake: When the gas station clerk jumps up from the floor, you can see the protective clothes he's wearing to protect him from the fire.
Revealing mistake: In the scene where Kate is aiming her gun at Scott while he is being seized by several vampires, it is clearly a dummy surrounded by other dummies when the shot is made and the group explodes.
Deliberate mistake: The disco ball doesn't start reflecting the sunrise until after the lead characters get out, even though it should have began to reflect light right when the door opened.
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