Continuity mistake: When Lucille throws the pills to Marv, he catches it with his left hand (while holding a cigarette in his right hand). The shot changes immediately to a close up on the pills in Marv's right hand. Then in the next shot Marv takes the pills, but has to take the cigarette out of his mouth first.
Continuity mistake: In the scene where Michael Clarke Duncan has Rosario Dawson tied to the chair, in one shot her left earring is tied next to her neck with the rope holding her to the chair, but in the next shot, the earring is hanging free. The shape of the earring prevents it from simply being pulled from the rope because of how rigid it is.