Revealing mistake: In the final game against Iceland scene, there is a point where you can see that the people in the stands are actually cardboard cut-outs.
Revealing mistake: Signs for Baltimore based businesses are clearly visible in the stands, such as "Sheraton Inner Harbour" and various Baltimore banks.
Revealing mistake: In the fight between Julie and Ned, when she does the last kick to take him down, it's obvious that she doesn't actually kick him.
Revealing mistake: In the scene at the finals at the end of the movie, you see Tuff take off his hat and smack the bull with it but then when he is bucked off you see him take it off again.
Revealing mistake: The dead girl in the holding cell can be seen breathing.
Revealing mistake: When the tiles pop off the wall near the beginning, each pops off right in the middle. The nozzles squirting out the water are obvious.