Continuity mistake: When Drew is in her car at the restaurant, chastising Adam Sandler for faking not knowing how to read, a truck with the "Spam" logo drives by. The DVD commentary states the logo was added digitally later. When Adam's character runs back to his car, the logo is not on the truck anymore. (00:37:10 - 00:38:20)Jack's Revenge
Continuity mistake: The waiter and Adam are talking about Lucy in the diner. There is a shot of Lucy across the diner. She is building a waffle house, and there is a glass of water to the left of her plate. Seconds later, the waitress walks by, and the glass is now a cup of coffee. (00:32:15)Jack's Revenge
Continuity mistake: When Lucy watches the video tape for the first time, then goes outside and stands on the deck she turns to face Henry and her Dad. There are two small boats going toward each other just as they are about to pass the scene cuts back to Lucy, then you see the two about to pass each other again. This happens a total of three times.
Continuity mistake: When Lucy and Henry are talking on the parking lot (just after he pretended to be illiterate), a boat with purple sail appears out of nowhere behind Henry and then disappears. (00:37:45)
Continuity mistake: Following their first encounter at the restaurant, Henry and Lucy are walking through the parking lot. The lighting conditions change from sunny to overcast between shots.
Continuity mistake: In the beginning, after Ula gets his stitches done, he starts to put on his vest when he goes over and talks to Henry. The shot cuts to Henry and then back to Ula and then he starts to put it on again. (00:04:10)
Plot hole: Lucy has been painting pictures of Henry since she moved into the institute. But she passes him at the zoo and doesn't recognize him.