Continuity mistake: When Joe gets injured and he insists the back-up quarterback goes in, he takes his wristband with all the plays on it off, so it can be given to the back-up. When the back-up quarterback is shown running on the field, he does not have it on, but when they show the back-up on the field, he does have the plays wristband on.
Continuity mistake: In the scene where everything is being ground up in the blender, Joe puts Peyton's glass on top of her notebook. A few minutes later, when the blender's contents explode over everything, we see a shot of Joe dragging Peyton back over to her notebook. But instead of the glass still being on the notebook, it has moved onto the table.