Continuity mistake: When Sawyer is put back in his cage after being given a pacemaker, he dips the sponge in the bucket straight away. As soon as the shot begins when Sawyer is looking at Kate undress, he is holding a completely dry sponge in his hand.
Continuity mistake: When Sawyer is in prison, he gets a visitor who takes something out of her bag. As she does so, Sawyer has his arms crossed in one shot and outstretched in the next. (00:19:20)
Continuity mistake: When Sawyer is given the heart rate monitor watch, the position of the watch face on his wrist differs when he is getting up. (00:15:30)
Answer: He was eating a peice of an orange with the skin still on.
XIII