L'erba del vicino

Walter's toy poodle Queenie was played by the same dog that played Precious in Il silenzio degli innocenti (1991).

At the end of the film, Ray comments on Carol's shorter haircut. In her last scene, her hair is back to its original length.

After the Universal Studios logo appears, the camera zooms into Earth and to where the film takes place.

At the end of the film, the effect is played in reverse.

There were three filmed endings to the movie. The first is the one that is in the normal release of the movie both domestic and international. The second, available as the 'alternate ending' on the DVD version, follows the path of the first one, but is slightly different and does not contain the sequence in which the ambulance crashes into the house or the part where Mark Rumsfield slide tackles Hans Klopek. It does have a few more scenes which include Hans being interrogated by the police, Dr. Werner Klopek giving a speech to the police on what is wrong with the suburbs, and Ruben telling Ray that he was going to enjoy having him over for their final dinner. The third (and most downbeat) ending, which has not been released in any form officially, is supposed to have Ray get killed in the ambulance by Werner, the Klopeks are pronounced innocent, and garbage bags are found bound and gagged in the Klopek's car trunk. The last ending follows the original ending contained in the script.

Featured in Siskel & Ebert & the Movies: Oscar Surprises for 1988 (1989)