Revealing mistake: During the mall chase scene, a cop car flips upside down and is sliding. At one point, the wires pulling it are briefly visible.
Visible crew/equipment: In a quick, wide shot of the front of the building at the end of the movie, as the cops are trying to break in, the camera and crew are reflected in the back window of the cop car closest to the camera.
Continuity mistake: During the mall chase, a semi-profile shot shows the squad car roll onto its roof and slide with a large panel of orange signage pinned under the roof. Camera cuts to a view of the officers inside the squad car, and there is no signage nor any other debris pinned under the car's roof. Camera cuts back, and the signage is again pinned under roof. Camera cuts back to frontal view, and the signage is gone again.
Continuity mistake: In Ray's, the keyboard of the electric piano Ray plays alternates between being lit up and not lit between shots.
Visible crew/equipment: As Elwood looks up at Mack in the diner, the camera and lighting rigs can be seen in his shades.
Continuity mistake: The woman in the car trying to shoot Jake has a couple of errors. First, she gets six shots out of a four barrel weapon without reloading. Second, she goes from having the weapon out of the window, to no weapon and driving in one second, where it took at least five or six seconds to get it out and aim it.
Continuity mistake: As Unit 10 slides along in the mall, it alternates from the front dragging on the floor, to only sliding on the roof in close ups on the cops.
Revealing mistake: As trooper Car 10 drives along in the mall, they hit an obviously poorly disguised ramp that disappears after use. Later, it's sent into a spin by unit 70, and you see it on an obvious turntable.
Continuity mistake: When the Nazis are parked in the alley and see the Blues Brothers pass, their car begins to move. In the next close-up shot of the Nazi leader, their car is at a stop. (01:50:05)
Continuity mistake: As the Bluesmobile screeches to a halt on the sidewalk at the end of the long chase, it leaves obvious tire trails on the sidewalk. But in the very next shot (when the car breaks apart), the trails are gone. (02:12:00)
Character mistake: When Elwood tells his boss he is going to quit, his boss tells him he will call payroll and have them get his severance pay ready. While employees who resign do have final pay prepared (pro-rated pay, vacation pay, time owed in lieu, etc.) it would never be classified as "severance pay" if the employee resigned on their own accord. Severance pay is classified for employees who are terminated without cause, meaning no fault of their own. (00:43:10)
Suggested correction: This isn't entirely accurate, only what is most common. First, severance pay is not required by law, nor is paying for accrued PTO, so it's at the discretion of employers who can offer it to whomever they wish. An employer may offer a severance package for termination (with or without cause), retirement, or resignation. Often a severance package comes with certain conditions, such as the employee won't seek unemployment or work for a competitor, or may simply be money paid for PTOs.
Suggested correction: This never happened in the movie, Elwood didn't have a job.
Continuity mistake: At Chez Paul when the sommelier is filling Elwood's glass with champagne, he begins to pour and does so again after the cutaway.
Continuity mistake: When the Blues Brothers are paying the assessment in the Cook County Assessor's Office, the area behind the assessor has a desk and is not very wide. In the shot where the camera has panned out, it shows a much larger area behind the assessor. Additionally, how did all of the emergency services personnel get in the room without anyone in the shot seeing or hearing them. When it cuts to this scene, the Blues Brothers look surprised, but they should have easily seen and heard this. (02:18:44)
Continuity mistake: Throughout the "Everybody Needs Somebody" song number, pay attention to the band member in the background smoking a pipe. More specifically, watch the smoke coming out of his pipe. Sometimes it's consistent from shot to shot, but at other times, it changes completely. (Ex. When Jake sings "When my soul's on fire," all of the smoke disappears between cuts).
Continuity mistake: When the brothers are in the fancy restaurant, Elwood drinks champagne from a glass. A few shots later the glass is filled back up again.
Continuity mistake: The sticker on the license plate is in the beginning on the left side (before the Bluesmobile jumps over the bridge), then on the right side (after the Nazis jump from the bridge). (00:08:35 - 00:52:40)
Continuity mistake: When the Blues Brothers first go into the tax building in Chicago, the building has gold numbers above the door that they are blocking from the inside that read 118. When the rest of the cops and a firetruck pass by, we now see the numbers are black and not even the same shape as the gold ones.
Revealing mistake: When the Chicago police cars have the first major pileup underneath the elevated roadway, a number of the cop cars are seen flipping over by using two rail-like beams along the road. When the rest of the cop cars come to a stop in the next shot, the beams are gone.
Continuity mistake: After the cop car hits the Winnebago, we see the car's back window is completely gone in two separate shots. However, when the camera angle does a close up on the car, we see a cop pushing out the rear windshield which was simply not there the shot before.
Other mistake: The Nazi leader tells a subordinate to get the license plate number of Elwood's car, but the car was long gone before he would have been able to see it.
