Visible crew/equipment: When Marcus attacks Simon at the loading dock, as Simon flies through the air after Marcus kicks him, you can see the face of Johnny Lee Miller's stunt double. (00:57:15)
Audio problem: When Marcus attacks Simon at the loading dock, Simon attempts to take out his weapon, but Marcus takes the firearm from him before Simon can assemble it. He takes the barrel in one hand and the rest of the weapon in his other hand, but one moment later, he's shown only holding the barrel as he removes the silver nails, meaning he must have dropped or thrown away the other part. However, we never hear any sound of the other part hitting the asphalt, even though Simon picks it up from the ground later during the fight. (00:57:40)
Revealing mistake: During the ceiling sex scene, Lucy's hair lays flat against the ceiling with no effects of gravity while Dracula's hair hangs towards the floor fully under the proper force of gravity. (00:57:45)
Continuity mistake: Mary's hairstyle changes dramatically from when she first meets Simon inside the Virgin Megastore to when they move to a more private place to speak on the Loading Dock in the next scene. It goes from very styled and curled to a much looser and messy style. (00:58:45)
Revealing mistake: When Solina is crawling on the wall, whenever she turns her head, her long hair turns with it, instead of falling freely downward toward the floor. (01:05:20)
Continuity mistake: When Mary turns on the lightswitch in Lucy's room and shorts out all the lights note the phone that is off the hook at the foot of the bed. The receiver is far enough away from the base that the cord is extended in a "U" shape, however, when the shot moves to close up on the phone the receiver is now close to the base and the cord is now twisted on itself. (01:05:20)
Continuity mistake: When Mary discovers her father's body under Lucy's bed he has a new wound above his right eye, but the much larger wound he received earlier in the evening fighting Solina and Trick is now missing. (01:06:55)
Revealing mistake: When Dracula drops Mary at the end of the film, she hits the sidewalk and it "gives". (01:26:50)
Continuity mistake: When Mary falls down on the sidewalk, she lands on her side, parallel to the road. In the next shot, she's lying on her back, perpendicular to the road. (01:26:50)
Continuity mistake: When Mary is lying on the sidewalk after Dracula drops her, there's a card under her right shoulder, which disappears and reappears between shots. (01:26:55)
Character mistake: The American flag at the New Orleans Mardi Gras is hung the wrong way on the building.
Answer: "Heads Explode" by Monster Magnet.
OneHappyHusky