Revealing mistake: After the coach [Michael Jai White] told Billy that the group of people present all chipped in to pay his entry fee, there was loud cheering ("Yeah!) but it wasn't obvious from where the cheering was coming - except when there was a close-up of a particular person. Otherwise, the people in the crowd - especially those closest to him - did not appear to be cheering. The cheering, as well as the people in the background (green screen), must have been added. (00:04:08)
Revealing mistake: When Billy went outside onto the front porch (mostly not visible), there were tall plants in front of him and the porch's steps seemed to run parallel to the house, not perpendicular. After Billy got to his Jeep, there were no plants in front of the porch/steps and the porch's steps were perpendicular to the house. (00:07:40)
