Continuity mistake: In the scene at the apartment with Brett, Vincent closes the briefcase and leaves it on the kitchen counter. He continues to smoke until it's almost time to shoot Brett. They shoot Brett and the scene fades out to be continued later. Later we see that after shooting Brett, Vincent is focused on Marvin still in the corner having a panic attack. Jules tells Marvin to knock it off and the man comes out of the bathroom. Jules and Vincent shoot him, then Vincent chides Marvin for not telling them there was someone in the bathroom. Vincent only has his gun in his hand, no briefcase. Jules and Vincent argue about 'the miracle' and they leave. Marvin never leaves the corner until Jules tells him 'let's go'. Nobody has the briefcase. (00:18:10 - 01:53:30)
Continuity mistake: At the beginning, when Brett is initially shot by both Jules and Vincent after Jules' Ezekiel speech, we see Jules' gun becomes empty on firing the last shot. However, on returning to the same scene at the end, when Jules and Vincent shoot Brett the gun does not empty; in fact Jules is able to repeatedly shoot the guy who comes out of the bathroom afterwards and the gun still isn't empty.
Continuity mistake: The tall "Big Kahuna Burger" bag, disappears when the camera faces Brett yet it's there when the camera is behind Brett. The bag is only a few inches to the left of the soda when the camera is behind him so it should be there in the front shots too, yet isn't. (00:14:30 - 00:16:20)
Continuity mistake: When Mia and Vincent arrive at Jackrabbit Slims, they stand in front of a desk and confirm their booking. Throughout her exchange with the 'greeter', Mia's fringe is swept to the side, looks a bit greasy, and is separated. When they go to walk to their table in the next shot, it's suddenly perfect and covering her whole forehead. (00:41:10)
Continuity mistake: When Vincent takes Mia home after giving her the shot, Vincent and Mia talk, then Mia finally tells Vincent the Fox Force Five joke. Before and while she tells the joke, in every shot behind her, her arms are down by her sides, yet in every front view of her, her arms are folded, or one arm is up by her mouth. (00:59:50)
Continuity mistake: After Mia has recovered from the overdose, Vincent carries her to her house. As they are walking in the small alley, the camera shows Vincent saying, "If Marcellus lives his whole life he doesn't need to know about this incident," and he opens his arms. In the next shot we can see Vincent from the back and he has his arms in a different position. (00:59:10)