Stephen King has mentioned this movie as the reason he decided on a topiary instead of a hedge maze in The Shining (1980). Stanley Kubrick could not get the topiary to work to his satisfaction, so he went with the hedge maze instead.
A bedroom scene, in which Bella asks Kenneth to take her home, was scripted and shot but cut from the movie. Photographs of the scene, featuring a bare-chested Nicholas Cortland smoking a joint, were released with the film's press material.
The trivia items below may give away important plot points.
Iris was originally supposed to be lured into a quicksand pit by butterflies, and drown. The scene was shot, but it was deemed too silly for the final film. The scene was re-shot to have Iris killed by a rattlesnake instead. Clips of the original death scene appear in the film's trailer.
The movie implies that most animals have turned on humans. Crockett's family dog stays loyal until the end, which may imply that dogs are not part of the animal revolution. This would support the popular saying that "dogs are Man's best friend".
At first, the animals seem to attack the Crocketts out of revenge. The grandmother is a butterfly collector, the grandfather has a trophy room, the others want the frogs poisoned because of their constant croaking. The animals even seem to spare Pickett Smith in the beginning. The animals eventually attack him, though that might be because he decided to help the Crocketts. If the "animal apocalypse" theory is correct, then Smith's actions don't influence their deadly behavior after all.