House of the Rising Sun - S1-E6
Continuity mistake: When Jack is packing water bottles in to the sack and Locke says "I think One of Us should stay and help Charlie salvage the wreckage", you see Jack putting a bottle in to the sack. His hands are now empty, but when it cuts he suddenly has a new bottle in his hand which he puts in to the sack. (00:16:05)
Continuity mistake: During Claire's second visit to the psychic, her hair changes position between shots. In one shot, it's hanging loose and in the next, it's tucked behind her right ear. (00:27:10)
Exodus (1) - S1-E23
Revealing mistake: In the scene just after Sawyer is mounting the radar on the mast of the shop, Sayid hands Michael a flare gun. He opens it to show that there is just 1 shot left. If you look closely the flare gun shell has already been fired (notice the center fire pin is indented). (00:34:30)
Continuity mistake: When Sayid opens the lid of the compass to show Jack, in the close-up, all of Sayid's fingernails are short and trimmed, yet, in previous and following shots (including next episode "Special") some of his fingernails (such as the thumbs) are very long again. This occurs in many other episodes, such as "Exodus 2". (00:24:40)
Continuity mistake: When Claire puts up the drapes, one is caught on a plant. When Thomas walks over to the drapes, it's not caught anymore. Neither Thomas nor Claire have been near the drapes during this time. (00:16:50)
Continuity mistake: Kate says she looked at the envelope of the letter - the camera shows a closeup of the envelope which on the right hand side of the crest has no creases and just 1 barely visible fold. When Sawyer goes to snatch it back, the envelope is already creased significantly. (00:33:55 - 00:35:35)
Homecoming - S1-E15
Continuity mistake: At the end of Jack's fight, Ethan has 5 blood trails on his face that disappear briefly. (00:34:00)
Homecoming - S1-E15
Continuity mistake: During the fight between Ethan and Jack you can see as Ethan rams Jack against the tree, his tattoo has switched sides. (00:33:20)
Homecoming - S1-E15
Continuity mistake: When Boone runs into the jungle in daylight he holds his stick at an angle pointing up. We then see a closeup shot of his hands holding the stick and it's horizontal. (00:21:00)
Homecoming - S1-E15
Continuity mistake: When Charlie examines the snuffbox, its position rotates 90°. (00:14:20)
Homecoming - S1-E15
Continuity mistake: When Charlie is talking to Claire explaining where she sleeps etc, Claire's hair is constantly switching between tucked behind her ear and hanging free without her touching it. (00:05:00)
Continuity mistake: When Shannon dies, Boone has his right hand on her chin. Camera changes and now it's by her ear. (00:37:40)
Whatever the Case May Be - S1-E12
Continuity mistake: Sawyer says there's no way to open the case and that he's doing it for his own curiosity. When he does, Kate has her hair behind her right ear. Camera cuts and now it's dangling in front of her face. (00:19:30)
Whatever the Case May Be - S1-E12
Continuity mistake: When Sawyer tackles Kate for the case, her back gets dirty and has stuff stuck to it. When she lunges at the case a few seconds later her back is clean. (00:19:00)
Answer: He was eating a peice of an orange with the skin still on.
XIII