Trivia: In an interview, the director stated that hoverboards were real, but they weren't on the market because parents didn't like the idea of floating children. He said this as a joke, but this didn't stop mass hysteria as thousands of kids went from store to store looking for hoverboards.moviedude345
Trivia: This is a true story. After the death of his sister, Robert Harling locked himself in a room and 10 days later came out with this play which 3 years later became a movie. The movie was even filmed in the town that where everything happened and the nurse and doctors who cared for his sister Susan played themselves in the movie.
Trivia: The dead sailor harbouring a live crab, spooking Jammer out of his wits in the sunk submarine, is director James Cameron's younger brother Mike. The scene had to be shot several times to get it right, forcing Mike to hold the live crabs in his mouth, until the cry for "action", before releasing them. At one point he had to crush one with his teeth, as it gave him quite a bit of grief. Brotherly love immortalized.
Trivia: When they are in the museum and Harry says "For the rest of the day, we are going to talk like this...", the last thing he says is ad libbed. "But I would be proud to partake of your pecan pie." is not in the script. You can see Meg Ryan look off-camera at the director and say "Oh, no" but she continues with him. It's obvious that she wasn't expecting it. [This is confirmed as true in the documentary on the DVD.]