Corrected entry: At the beginning of the movie when James "The Grim Reaper" Roper (Damon Wayons) is fighting his first opponent it seems as if the MGM Grand Arena is packed, but when Roper starts to pound his opponent in the corner you can see that there is nobody in the crowd above the man's head.
Corrected entry: At the beginning of the movie when it has the close ups of the boxers fighting, you can see that they are hitting themselves in the face.
Correction: When they show the close up, we only see one boxer throwing punches as if the camera (and thus the audience) was the opponent. All you're seeing when Damon Wayans throws an uppercut is his body naturally moving with the force of the punch, not him reacting to being punched.
Corrected entry: When "Irish Terry" is talking to his trainer and Jeff Goldblum right before he goes to fight Damon Waynes, his trainer pulls out white boxing gloves for him to wear, but when he gets to the fight he is wearing black gloves.
Correction: If you listen he refuses to wear them because he regards it as being "Racist".
Correction: There's no indication the place was packed (in fact the point of the movie was they couldn't pay Roper because of low sales.) But we actually see plenty of people in the crowd and not empty seats, that is when the background isn't blacked out.