Continuity mistake: When Rabbit and his mom's boyfriend were kicking each other's ass inside the Smith's trailer, Rabbit pushes or punches the boyfriend from the kitchen to the living room, breaking a small wooden post in a quick shot. A few shots later, when Rabbit returns to the trailer, the wooden post is intact. There was no time to fix it.
Continuity mistake: When Rabbit goes to his mom's trailer for the first time, he is wearing street shoes, but when he takes Lily in the trailer he is wearing boots. (00:10:14)
Continuity mistake: When Jimmy and Wink are walking to the bus stop, and Jimmy says "don't tell anyone I'm living back here man", they are just about to walk past a blue and white trailer. But when it cuts to the next shot with Wink saying "I heard you got caught out", they have walked about 15 feet past the trailer.
Audio problem: When Jimmy takes Lilly inside, the first time he gets to the trailer, you hear Greg say "What the f*ck I do?" But his mouth isn't moving at all. (00:12:20)
Continuity mistake: During the final battles, Wink is wearing a Kangol flat cap to the side of his head. After Rabbit defeats Papa Doc, Wink is seen wearing a baseball cap to the side of his head.
Continuity mistake: When Eminem and his friends are riding in the car, they pull out the paintball gun and shoot the police car windshield. They are driving from one direction, while the splatter shows that the paintball comes from the opposite direction. (00:24:20)
Continuity mistake: When Rabbit is carrying Lily into the house singing to her, as he turns the corner into her room, you can see his mouth isn't moving, not to mention really singing, until the shot where you see his face head on.
Factual error: DJ Iz mentions how Detroit never tears down any of its abandoned buildings and just builds casinos. No casinos were built in Detroit until 1997-98, and the film is supposed to be set in 1995.
Continuity mistake: When Poppa Doc is holding the gun to Jimmy's head, he first has it touching his jaw, then when Wink is begging him not to shoot Jimmy, the gun is just in front of his mouth, then when the shot cuts back to Jimmy, the gun is touching his jaw again.
Continuity mistake: Before the opening battle scene, when Eminem is outside changing his top he asks for some privacy. At first his clean top is on one arm, then the shot changes and the top is laid out flat on the top of the dumpster. When the shot changes back, the top is on his arm again.
Continuity mistake: When Jimmy is rapping in the parking lot, his hood changes position to where it is on his baseball cap in every shot.
Visible crew/equipment: Just after Jimmy had a discussion with Janeane outside the factory, a boom mic is reflected on a glass on his right side. (00:46:00)