First Down - S2-E4
Continuity mistake: The amount of damage to Michael's car keeps changing drastically. In one shot the wing mirror is attached, in others it's not, then it returns, etc. (00:02:30)
First Down - S2-E4
Continuity mistake: During the car chase in the beginning of the episode, Bellick's car swerves to avoid hitting a truck as they go over a bridge. The next shot is from in front of the cars, and in the background you can see the bridge and a stretch of road behind it, but the truck has vanished. (00:02:40)
First Down - S2-E4
Continuity mistake: All throughout the car chase, the car Michael and Lincoln are in has a license plate on the front bumper. But after Bellick has forced their car off the road, the car makes a jump before hitting a tree, and while it is in mid-air you can see that the license plate has disappeared. (00:02:50)
First Down - S2-E4
Continuity mistake: The front licence plate disappears from Link's car as it hits the tree. (00:03:20)
First Down - S2-E4
Continuity mistake: Bellick's partner, Geary, is wearing a light grey T-shirt, with a very prominent sweat stain on the front. Throughout the episode, this stain constantly changes shape and size, even within two shots of the same scene, and sometimes it disappears altogether. This is best seen when him and Bellick are herding the prisoners to their car. In the close-ups of him, his shirt is completely dry, in long shots the sweat stain is there. (00:04:45)
First Down - S2-E4
Continuity mistake: When agent Mahone is looking at the photocopied newspaper articles, at first he is holding a single sheet of paper, and you can read the headline in reverse through the paper: "Life Sentence for Mob Boss Abruzzi". We then get a close-up of the articles from his point of view, and he is now holding two sheets of paper, where the topmost reads "Governor's Daughter Wins Humanitarian award". Mahone places this paper on his desk, and you can see that he is once again only holding the one "Life Sentence." paper he had to begin with. (00:05:30)
First Down - S2-E4
Continuity mistake: When Mahone is looking at the newspaper headlines, the headlines change from being about Abruzzi to Sara between instant camera shots. (00:05:30)
First Down - S2-E4
Continuity mistake: When Tweener is in the car and he turns the radio over, his arm is holding onto the top of the window or leaning in depending on the shot. (00:07:00)
First Down - S2-E4
Continuity mistake: When Sarah is in the church, she is clapping the previous addict after his story. Camera cuts and she is no longer clapping. (00:09:15)
First Down - S2-E4
Continuity mistake: When TBag is in the bathroom he has the blade against his finger. Camera changes and it isn't. (00:11:50)
First Down - S2-E4
Continuity mistake: When Michael's wife tries to get Bellick's gun, he catches her and her jacket is undone. Next shot of him chucking her back to Michael and Lincoln, her jacket is done up. (00:28:25)
First Down - S2-E4
Continuity mistake: When Michael is on the phone to Sara, his head is repeatedly changing between on the wall and off the wall during instant cuts. (00:31:20)
First Down - S2-E4
Continuity mistake: When Tweener is in the motel after having a shower, he dries off almost instantly. (00:33:10)
First Down - S2-E4
Continuity mistake: When John goes into the Motel room he stands next to the strip of light on the wall. Camera changes and he's in the strip of light. (00:34:00)
First Down - S2-E4
Continuity mistake: When Mahone tells John he is going back to Fox River or the morgue, the position of John's necklace on his fingers changes position between shots. (00:35:00)
First Down - S2-E4
Continuity mistake: When Abruzzi is shot, he falls backwards and lands with his head pointing towards the wall of the motel. Cut to the FBI agent, then back to Abruzzi, and he is now lying the complete opposite way, with his feet pointing towards the wall. (00:36:30)
First Down - S2-E4
Continuity mistake: When Tweener is talking to the girl in the motel room and she says she likes him, his head goes from leaning right to left instantly. (00:37:30)
First Down - S2-E4
Continuity mistake: Link pulls the clip out of his pocket, and the way he holds it changes between shots. (00:39:00)
Answer: Because of coincidence.