Continuity mistake: In the first training montage, Kate changes clothing for a split second. Initially she is wearing a red outfit with black legwarmers. She changes to green lycra pants and black legwarmers, then back to the red dress and black legwarmers. You can also see Douglas' grey hoodie is swapped for a red top. (00:23:55)
Continuity mistake: In the scene where the coach comes to recruit Doug, Doug is hanging upside down hammering nails. The nails change position several times.