Revealing mistake: With Marshal Mars in pursuit, as Ray drives his pickup, he holds the steering wheel with his left hand, and his stiff prosthetic right arm is down at his side. When Kate grabs for the steering wheel, in the side exterior shot the stunt driver is quite noticeable, as he grips and turns the steering wheel with his good right hand/arm. (00:30:40)Super Grover
Revealing mistake: When Goodwin and Ana Lucia sits down to have a break and Goodwin hands over some fruit to Ana, she says "Where do you think they got it? I mean they're not even wearing shoes", directing to the knife. If you watch in the background you can see a car driving.Mortug
Revealing mistake: When Kate pulls Ray from the burning pickup, he has bloody bruises at the center and right side of his forehead. As she drags him across the grass, in the shot when she grunts, the bruises on his forehead are at the center and left side of his forehead. This shot is flipped. (00:03:15)Super Grover
Revealing mistake: On their way back to the hatch with the dynamite, Kate, Jack and Hurley run from the "monster" but Locke runs toward it. When he lands on his back the shot cuts away to the "Lost" logo floating onscreen. When it cuts back to Locke, in this shot the bruise is over his right eye, instead of his left. The shot is flipped. (00:44:50)Super Grover
Revealing mistake: When Kate is with Ray in his pickup, he wears his wedding band on his left hand, and his right arm is prosthetic. After the wreck, when Kate pulls him from the cab and onto the grass, he wears his ring on his right hand, the door and Kate's bracelet are also on the wrong side - obviously a flipped shot. (00:30:50)Super Grover
Revealing mistake: After Sayid stabs Sawyer, in the wideshot when Jack pushes Sayid away, as Sawyer lies with his right arm outstretched the knife is nowhere to be seen. In the next close-up, the large, long-handled knife is protruding from Sawyer's upper arm at about a 90º angle. Given the angle and position of the knife, it should have been seen in the previous shot. (00:30:20)Super Grover
Revealing mistake: After Sawyer has been shot with the syringe thing (I'm not sure if Kate had been shot yet) Jack fires his gun five or six times into the jungle. The last few times he fires it there is no flash or any indication that the gun has been fired.
Revealing mistake: When Jack and Kate run from the bees, they enter the cave, and when they remove their tee shirts Jack's back and sides are perfectly visible. There is not even the slightest hint of any kind of scar, on the left side of Jack's back, from the nasty cut that Kate recently sewed up with the black thread. (00:12:40)Super Grover
Revealing mistake: When Shannon carries and drags the luggage (some of Boone's) she breaks down and Sayid speaks to her. When he says, "It won't be too much if I carry it for you," he strokes her cheek with his left hand - note the watch. After he says, "I have a hike to lead," in the next wideshot he's still holding her face with his "left" hand. But, note the lack of watch, and her large suitcase is now backwards. They flipped the shot so his right hand would appear to be his left, to keep hand continuity, but it doesn't work. (00:17:10)Super Grover
Revealing mistake: When Kate is in Ray's pickup, as they drive down the road, she looks into her side view mirror twice, over a minute apart. Firstly, the road that passes in the view reflected in the mirror is perfectly identical in both instances that Kate looks at it, which is impossible - the same shot is used twice. Secondly, the road that passes Ray's truck is completely different to the road that passes in the view reflected in the side mirror, they are obviously edited together. (00:21:55)Super Grover
Revealing mistake: In Boone's flashback in the hotel, you can see the Sydney Opera House out the window which looks nice, except that in order to see the it from that perspective the hotel would need to be EXACTLY where the Harbour Bridge is, but there are no hotels in Sydney that could provide this angle of view. (00:36:00)
Revealing mistake: Sun's left earlobe has a cleft, but while Jin is still cuffed to the wreckage, Sun watches Michael head off through the trees (to cut firewood) and in this close-up it is Sun's right earlobe with the cleft. The shot is flipped. (00:28:40)Super Grover
Revealing mistake: As several camera angles show, Sawyer's makeshift stretcher was made by drilling multiple holes in the upper frame struts, through which was threaded rope made from dried roots or vines. The cast who supposedly constructed it were not carrying power drills among their primitive implements.