Continuity mistake: When Jack, Charlie and Kate are walking through the woods and Jack is holding the transceiver, Charlie ask if he hears anything. Jack then answers "You keep asking if there's anything", while holding the transceiver with his right hand and his left hand down. When it cuts he holds on to the transceiver with both hands. (00:00:20)
Continuity mistake: When Hurley gets to Sayid who is about to fix the transmitter, Sayid puts down the battery on the case. It cuts and the battery is back in his hand and in the next shot the battery is on the case. (00:10:15)
Continuity mistake: On the airplane, when Kate lifts the glass of juice with her handcuffed hands, in this close-up the cuff round her right wrist has the single bar facing out. However, when the turbulence hits, in another close-up of her hands, the same cuff is on the opposite way, it now has the double bar facing out. (00:31:10)
Continuity mistake: When Sawyer and Sayid are fighting and Jack tries to pull Sawyer away, Sayid changes from holding onto Sawyer's shirt to holding onto his pants between the shots. (00:07:55)
Continuity mistake: When Jin offers food to Claire while she is writing in her diary, we see her writing while holding the diary in her hand. When it cuts she holds the book in both hands, place it in her left hand and begin writing again. (00:23:40)
Answer: He was eating a peice of an orange with the skin still on.
XIII