Continuity mistake: Just after the title sequence, we see Faraday holding a map in two hands in a close-up, but with one hand and one hand pointing at the map in a longer shot. (00:10:40)
Character mistake: When Jack and co find Frank, we see Jack checking for a pulse and declaring there is one. However, Jack is using his thumb to check for a pulse on Frank's wrist. As a doctor, Jack would know your thumb has its own pulse. (00:33:40)
Continuity mistake: When Sayid finds all the passports, he opens one and the way he holds it differs between camera angles. (00:25:00)
Continuity mistake: When Sayid sits down in the café, the woman he sits opposite is playing with her hair in the shot facing Sayid, but has her arm down in the shot facing herself. (00:06:33)
Continuity mistake: In Tunisia, we see someone grab a newspaper and hold it by the side and top in a long shot, but from opposite sides in the close-up shot. (00:22:10)
The Beginning of the End - S4-E1
Visible crew/equipment: When Hurley hugs the detective after being told he can go to the mental hospital, a camera and operator's hand can be seen in the background. (00:06:00)
The Beginning of the End - S4-E1
Continuity mistake: We see the red car at the start smash through some fruit stands. All the fruit falls off the car, and we then see the car skid round a corner with more fruit falling off it, despite there being no fruit on the car by this time. (00:01:30)
Answer: He was eating a peice of an orange with the skin still on.
XIII