Continuity mistake: When Jake and Elwood are running form the police for the first time, they do a 360 degree spin in the middle of an intersection. The car is spinning clockwise but when the camera focuses on Jake the scenery in the back is spinning as if they were going counter-clockwise. (00:27:35)
Continuity mistake: When the multitude of police are shooting through the door at the end of the film, there are loads of bullets shot at the door, then there are only a couple dozen bullet holes then there is a bunch of bullet holes. (02:12:40)
Continuity mistake: When the Blues Brothers park outside Mrs. Tarantino's house, the car's front wheels are almost level with the path to her front door. When they start the car to drive off a bit later, it is parked further back with its front bumper level with the path. (00:44:06)
Continuity mistake: In the first scene where we see Carrie Fisher, during the 'Peter Gunn' sequence, she pulls out a bazooka with four barrels and fires one missile at the Blues Brothers. Then in the next shot (looking down on her car), she fires another four missiles without reloading. (00:35:00)
Continuity mistake: During the highway car chase, when the police cars are shown going over the ledge and down the embankment, car number 73 goes over the ledge twice. (01:45:45)
Continuity mistake: Where Curtis is getting Elwood and Jake a drink of Jack Daniels, when he gets the bottle it's nearly full, but ten seconds later, after he has got some drinking glasses and starts to pour, it's almost empty. (00:15:45)
Continuity mistake: After we've heard why it's so great to be an Illinois Nazi, there's a wide shot of Jake and Elwood's car in a queue, and a policeman walks past the driver's door. In the next shot, the cop hasn't yet walked past the door, and instead of doing so, he stops when the Blues Brothers ask what's going on. (00:56:14)
Continuity mistake: In Chez Paul's restaurant, when Elwood and Jake first sit down, the waiter in the top right of the wide shot walks around a seated man in a dark suit; four seconds later, in a closer shot of them putting their napkins on, the waiter walks round the man again. (00:50:37)
Continuity mistake: Just before the Mystery Girl blows up the building in which Elwood resides, a police car with lights on its roof pulls up outside. When the building actually explodes just over a minute later, you see that the police car parked outside no longer has any lights. (00:39:54)
Continuity mistake: When Carrie Fisher first attacks the boys with rocket-propelled grenades at the hotel doorway, they dive for the sidewalk and are covered with debris. As they rise moments later and enter the hotel, their black suits and hats are covered in white cement dust. In the immediate next shot, as they climb the hotel staircase, their hats and suits have no dust whatsoever.
Continuity mistake: Spielberg puts the stamp parallel to the paper, but in the close-up it's skewed.
Continuity mistake: Near the end of the movie when the brothers are preforming "Sweet Home Chicago", they do a lot of spins and turns. The very last spin they do puts Jake towards the audience and Elwood towards the band. Then the camera angle is changed and Elwood is towards the audience and Jake is towards the band. (01:55:05)
Continuity mistake: When Elwood and Jake "See the Light" at the church, they begin dancing wildly at the far end of the aisle - yet in a static shot of the dancing later on, the Blues Brothers are seen standing still at the end of the church, just as they did before Jake saw the Light. (00:23:00)
Continuity mistake: When Carrie Fisher is shooting at Jake and Elwood in the tunnel under the Palace Hotel, she hits a water pipe and water sprays everywhere in a mist. In the next shot of Jake and Elwood lying in the mud, there's no spray visible behind them at all. When Jake stands up a few seconds later, the spray is back, but is more directed now. (01:57:39)
Continuity mistake: When Carrie Fisher is shooting at the Blues Brothers in the tunnel, there are 3 pipes that run along the left side of the wall that aren't alongside Carrie when the camera angle changes to shots of her.
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.
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.
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)
Answer: It's 'Can't Turn You Loose,' often refered to as the Blues Brothers Theme.
rabid anarchist
Also done much earlier by Otis Redding.