The police-escort cars all become smashed and stove in after getting "smoked out" by the bootlegger's fog machine and run off the road, yet when they reappear to resume the chase, the cars' front ends are undamaged.
Extremely obvious brilliant-orange flash of the property-bomb used to explode the General Lee's tire and produce an impressive bang of the tire's blowing out..
When Luke gets back in the General Lee after placing the DETOUR sign, he gets in through the door, as seen by him closing the door. The General Lee's doors are welded shut since its a race car and the boys always go through the windows.