When the Shark goes after Clark his hat is clearly wet. Seconds later when he goes after Jena it is clearly dry.
When the kid writes the note, he scribbles gibberish.
Cody asks Jena what she was doing out at five a.m. when he and his grandfather are going on their fishing trip. On Christmas Eve Day, the sun would not be up for another few hours.
During the fishing scene with Papa and Cody, Cody is holding his rod upside down.