When Andy is removing his luggage (in black plastic bags) from his car, he removes the license-plate cover that indicates that it is a rental car. When he's speaking with Darkwood, the license plate cover reappears; when he returns to the trunk, it is gone again.
Ruth causes a falcon to appear on her arm behind a huge card fan. As the camera pans back over to counselor Andy, then begins to glide through the scene, Ruth is seen in the distance lowering an obviously styrofoam or stuffed, lightweight, peregrine-falcon prop.
After the Top Hat finalist talent show competition and stage performance near the end, Preston says to all the kids on stage, "Can you clap twice for me?" They all actually clap three times.