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.
50 First Dates (2004)
1 plot hole
Directed by: Peter Segal
Starring: Adam Sandler, Drew Barrymore, Sean Astin, Rob Schneider
Continuity mistake: The dark roots of Lucy's hair can be seen off and on throughout the movie. One day she will have dark roots, and the next day she won't.
Dr. Keats: Little Sammy Sosa's a bit shook up, but she'll be okay. She's watching the tape as we speak.
Henry: Good. How's my temporal lobe looking there, Doc?
Dr. Keats: Don't worry. You're not gonna suffer any short term memory loss. But was your head shaped like an egg before she hit you?
Doug: Hey! Don't make fun of Henry, all right? It'th not hith fault hith head'th thaped like that.
Dr. Keats: Note the intense overreaciton. That's the 'roids talking.
Trivia: When Henry (Adam Sandler) is at the golf course with Ula and his kids, everyone except Henry is teeing off in the same style as Happy Gilmore (also played by Sandler) in "Happy Gilmore" (1996). When Henry sees this, he replies, "That is the dumbest thing I have ever seen."
Question: If Lucy's father was the one that gave Henry the Beach Boys CD, how could Henry take that as a sign that Lucy remembers him?
Chosen answer: Lucy's father previously told Henry that she only sings on days that she meets him - then you see a flash of her painting in the garage, singing a Beach Boys song. Right before he hands Henry the Beach Boys CD, he tells him that she's even singing again. Henry realized as he listened to CD - maybe if she is singing again, she is thinking of him, hence, remembering him. (It happens to be the same song that she was singing in the garage that's playing on the boat when Henry turns around to go back. It's called 'Wouldn't It Be Nice').
Why wouldn't the father just tell him directly "hey she's been painting and singing again, so she probably might remember you"