Continuity mistake: When Lurtz was about to kill Boromir, Aragorn knocked the Uruk-hai down. He falls, drops his bow and arrow, then he picks up a sword and shield off a dead Uruk. Once Aragorn and Lurtz start fighting, the dead bodies disappear. When the fight is over and Lurtz is dead, all the dead reappear. (02:40:43)
Continuity mistake: After the battle at Amon Hen, Frodo rescues Sam from drowning and pulls him into the boat. During their dialog in the boat, you can see that the boats' stern is pointed toward the bank of the river. There is one brief view of them from the riverbank where the side of the boat is facing the riverbank.
Continuity mistake: When the argument breaks out during the Council of Elrond, the elves are standing on the viewer's left, and the dwarves on the right. But when a reflection of them is seen in the Ring, the elves are still on the left side and the dwarves on the right side.
Continuity mistake: Near the beginning of the film, when Frodo and Gandalf are riding in his cart together talking, there are some close-up shots of just one character or the other. However, the background in the Frodo shots and the background in the Gandalf shots are moving at noticeably different speeds.
Continuity mistake: This is in the extended version only. When the hobbits are in the bar in Hobbiton, and Merry and Pippin are on the table singing, Frodo is skipping around the table singing too, with four mugs of ale in his hands. However, as he skips around, you can see that the mugs are empty, but he then puts them down in front of some other hobbits, and they have something in them.
Continuity mistake: When Aragorn is kneeling with the dying Boromir, the amount of blood on Aragorn's mouth/nose slowly decreases throughout the scene, though he never wipes his face.
Continuity mistake: When Arwen and Aragorn are talking on the bridge, she caresses his cheek and forehead. In the next shot, her hand is no longer on his face.
Continuity mistake: Before Bilbo leaves out the door for his journey, he has a tuft of hair that is high above his forehead. When he turns around to talk to Gandalf outside, his tuft of hair is not as tall as it was before.
Continuity mistake: At the very start of the film when Gandalf is in his wagon, Frodo stops him with: "You're late." Gandalf stops his wagon quite a way from the bank that Frodo appears on. Gandalf sternly delivers his line and moments later they both burst out laughing. Then Frodo almost steps onto the wagon which was much further from the bank during the first part of the exchange.
Continuity mistake: When Saruman is talking to Lurtz, Lurtz has black drool falling out of his mouth; but in the next shot, after Saruman asks who he serves, the drool is gone.
Continuity mistake: When Pippin says "What about second breakfast?" he's crouched over by the pony, a bit away from Merry. Aragorn says a line and the camera goes back to the Hobbits. Now Pippin is further from the pony standing right by Merry, not crouched at all. He couldn't have moved that far during Aragorn's line and be standing so naturally.
Continuity mistake: When Merry is collecting firewood at Amon Hen he has a visible breath. None of the other characters do however.
Continuity mistake: Not only do the arms on the two large statutes at Amon Hen change, the statutes themselves switch places. When we first see them, the statute of the younger man has a winged helmet and is on the left and the older with the smooth helmet is on the right. In the shot once the boats have gone past, the winged helmet statute is on the right and the smooth helmet statute is on the left.
Continuity mistake: When we see Frodo and Sam at the night party, there's a girl with curly hair behind them. Depending on the angle she is either dancing with friends, or walking alone. This changes back and forth.
Answer: "Fly, you fools"