David is in his room watching the Kung-Fu movie and has the remote in his right hand on his chest. When Marcus enters the room, David has the remote in his left hand by his side but in the next shot it is back on his chest in his right hand.
During stage two in the Colorado National Monument, they start off going the correct direction from East to West, but not far into the stage they are riding next to a rock wall and are going from West to East (the wall is on the riders' right hand side). If they were going the same direction as when they started, the rock wall would be on the riders' left hand side instead of their right hand side.
The racy photo from David's girl was face-up on his bed when the audience first sees it. When the actor stands up from the bed with the print stuck to his backside, the picture faces the audience, indicating that the picture was flipped, then attached to the actor.