Continuity mistake: In the first pursuit of the Creepy Thin Man, at the party, the girls are running down the stairs while they change and begin to litter the stairwell with clothes. There's one wig dropped that's dark brown/black and straight. Though Lucy's hair at the party does appear shorter than her actual hair length, her hair is curled up at the ends, not straight like the dropped wig. So whose was it? (00:23:05)
Continuity mistake: When the girls figure out that Knox is after Charlie, and Dylan thinks of the picture and they zoom in onto "Townsend." The shot before the final shot of the photograph shows Knox's father's arm around Charlie, when in all the other shots, he has his arms above his head. (01:00:05)
Continuity mistake: In the scene where the Angel throws Lucy's "homemade" muffin: The first muffin actually broke through the door and you could see the depth and the cracks around the point of entry. When the girl comes through the same door, you can see the door no longer has a hole in it, just a fake muffin with adhesive attached to the door to look as if it had done so previously. (00:11:30)
Continuity mistake: The shards in the broken window, from which Drew hangs with her sheet, look different after the repetition. In the original take it's made up of many more fragments than after the slow-motion. (00:57:25)
Continuity mistake: When the girls are at the race track, in one shot you can see Lucy Liu flashing a bit of cleavage (when she's wearing headphones). Then shortly afterwards she's behind Corwin's car, and she's got a relatively high collared black T-shirt on. (00:29:05)
Continuity mistake: At the beginning when the guy with the bomb and Drew Barrymore's character, in disguise, are falling out of the plane the guy with the bomb has it still strapped to his chest but after they land in the boat the vest has disappeared. It reappears a few moments later but then again disappears. (00:04:10)
Continuity mistake: When Lucy Liu is fighting the Thin Man in the tower, the bell falls. Soon afterwards he heads towards her, sword swinging, and we can see the bell again on the right. (01:13:40)
Visible crew/equipment: During the first 'Thin Man' fight scene with the girls, there is an aerial shot of the Thin Man as he jumps in the air. The back harness of the wires is visible. (00:24:25)
Continuity mistake: The picture of the "Creepy Thin Man" changes from the original one to the one Cameron Diaz later holds in her hand. (00:17:10)
Continuity mistake: As Lucy Liu is climbing up to the place Bosley has been kidnapped and brought to she is wearing a back pack. The first shot of her it is just a knapsack, then she has a large collapsible bow and arrow, far too large to fit in the pack. Where was it before? (01:07:50)
Continuity mistake: In the scene on the plane at the beginning, just before the bomber speaks, a stewardess passes in front of the camera. It's obviously to cover a cut - after she's passed, the amount of sun visible on the seats changes, the two women behind are closer to the camera, and the nun's looking the other way. (00:02:15)
Continuity mistake: In the party scene, when Bosley is talking to the president of Red star he is offered blowfish (1 in sixty chance of death etc.) when the dish is first brought out there is nothing on it - but when Bosley takes one he pulls saran wrap off of the dish. (00:19:25)
Suggested correction: Knox wasn't a trained pilot. Either he had no clue to what was going on, or he thought something may have been wrong, but didn't know what to do about it.
Taking off and landing a helicopter are by far the most intense and difficult part of a pilot's training. Seriously, 99% of learning to fly is learning how to land and take off. If the pilot is skilled enough to take off in a Huey he is easily skilled enough to notice a massive additional drag on his helicopter due to the additional weight of the angels and the air resistance put up by such a bulky protrusion on his aircraft. If he isn't skilled enough to notice that, he isn't skilled enough to take off in the first place.