Continuity mistake: In the first shot of Locke sitting in the wheelchair, in the airport lounge, he sits alone directly in front of the long rows of chairs. However, in the next overhead shot, the airline steward is at Locke's side as he sits near the large windows, nowhere near the chairs.
Continuity mistake: In the Oceanic Int'l departure lounge, Locke sits in his wheelchair near the large window, with the doomed plane in the distance. The attendant's desk is on the left, but the black lounge chairs, which are normally situated toward the center of the lounge, are gone in this shot; the chairs at the end of each row should be visible at this angle. These chairs are also seen when Hurley crashes the scooter into them.
Continuity mistake: When Michael sits with Walt at the airport, Michael says, "If you're worried about Vincent," and the newspaper in his hands is folded and held straight up with the blue Oceanic envelope. Yet, when he says, "Dogs fly in the luggage compartment all the time," the newspaper is sideways and there is no blue envelope.
Continuity mistake: When Kate and Sawyer begin their swim, Kate is not wearing a bracelet on either wrist, as she heads into the water. In a few following shots, including when Sawyer goes to "See what they got on em," Kate wears a bracelet on her right wrist, but when they head down to retrieve the case, the bracelet is gone as she pulls on the case. After Sawyer frees the case, in Kate's close-up the bracelet reappears, but now it's on her left wrist, yet when they reach the surface the bracelet's on her right wrist. Whew!