The boom microphone is visible several times on the top of the frame. Usually if a boom mic is visible in a finished film, it is either because of a mistake made by the filmmakers during shooting or (much more frequently) a mistake made by the projectionist at the movie theater - but in the case of this movie, the mic being visible is a joke meant to parody the lack of film production expertise on the sets of the original "blaxploitation" movies that this movie is referencing.
When Black Dynamite is shot in the shoulder and goes to the hospital, the doctor clearly says, "No fragments, in and out - you're very lucky, BD," indicating that the bullet went right through Black Dynamite. However he is only bandaged at the entry point of the bullet and there is no exit wound on his back.
In another nod to blaxploitation films, when Black Dynamite enters Jimmy's apartment finding it ransacked and is attacked by the Heavy Hitters; Black Dynamite fires eighteen shots from a six shot revolver.
When Black Dynamite is talking to Honey Bee, a tear running down Honey Bee's face disappears and reappears from shot to shot. This is deliberately mocking the lack of continuity shown by many of the movies that this film parodies.