Visible crew/equipment: When McGrady's dad is told to get out of there, a camera shadow is seen to move over the guard's uniform. (00:14:20)
Continuity mistake: When Mahone is in the bar at the start, his hand is constantly changing from up at his mouth to down by his side. (00:09:50)
Audio problem: When Whistler steals the truck at the end, he states "Hey my truck" however the audio is a clear overdub. (00:38:15)
Continuity mistake: When shooting at the car, Link hits the driver's side window. This bullet hole then moves between shots. (00:32:20)
Revealing mistake: When they get on the boat you can see the outline of the wetsuit under Michael's shirt. (00:27:20)
Continuity mistake: At the Buoy, McGrady's hair is constantly changing between shots. (00:21:40)
Revealing mistake: When running to the stash on the beach you can see tracks from previous takes. (00:15:30)
Continuity mistake: When Bellick is being choked, the guard's arm is constantly changing position around his neck. In some shots, Bellick's neck is in the guard's elbow joint, and in others it's halfway down the guard's forearm. (00:07:45)
Under & Out - S3-E11
Continuity mistake: When Link is dabbing Sofia's burn marks, the dressing changes from his left hand to his right hand instantly. (00:26:10)
Under & Out - S3-E11
Continuity mistake: The truck in no man's land comes to a stop next to the tunnel. Camera changes and now it's a good 4-6ft away. (00:15:10)
Under & Out - S3-E11
Continuity mistake: We see the truck approaching the tunnel in no man's land. In one shot from the truck, it is by a massive puddle. Camera cuts to a wide shot, and the massive puddle has gone. (00:14:50)
Answer: Because of coincidence.