Ronny's injuries sustained during his fight would have lasted weeks but they disappear immediately afterward.
At the end of the movie when Queen Latifah and Vince Vaughn are alone in the conference room after she grabs him by the lapels, the right lapel is folded over. In the next shot, the right lapel is straight.
When Ronny follows Geneva into the bar during the hockey game and confronts her about the affair, the Chicago Blackhawks are wearing different uniforms on the televisions in the bar than they are in the live game.
When Ronny jumps over the hockey barrier at the end, the bald security guard follows him jumping over the barrier twice. In the next shot, he is nowhere to be seen.
During Ronny's slideshow presentation scene, the same background extras pass by heading in the same directions multiple times.
When Nick revs up the engine after just starting the car, the temperature gauge is already halfway between C and H. In that brief period of time, the water temperature would not have even started to register.
The temperature gauge in the Charger shows the engine is warm. Electric motors don't generate heat. They also don't produce emissions; so there would be no need for a muffler, like the ones making the sound in the scene.
When Ronny confronts Geneva about the affair at the Blackhawks game, they miss a goal and the song "Chelsea Dagger" plays which is the goal song for the Blackhawks. In reality, when the Blackhawks score, the goal horn blows followed by song "Chelsea Dagger" by the Fratellis.
When Nick is shown simulating the reving up the car to display their finished product, the water/engine temperature gauge should not even be present since it is supposed to be an electric vehicle made to sound like a gas powered (V8) muscle car by way of a sound system in which these two (Ronny & Nick) have been developing for the automaker, thus the temperature gauge wouldn't be present.
While applying a cotton ball treatment to his face, first scene shows it be applied to under his right eye as he is apparently looking straight at her. However the application in next scene was applied to the side of his face.
In Robby's presentation, Ronny refers to two rival electric cars that are uncool. He show a picture of a Smart ForTwo that he incorrectly calls a Nissan Spin and a picture of a Toyota Prius he incorrectly identifies as a Chevrolet Footprint.