The actor who appears at the party scene claiming to be the father of Chris Penn is Leo Penn, his real father.
According to Lea Thompson, she had a nude scene that was cut out of the final print. According to her, it was "too sexy" for the film.
In the scene where Tommy jumps out of the window the music score by Eddie Van Halen is the exact recording of the music used in Back To The Future when Marty puts the cassette in the Walkman to wake up George McFly.
During the credits, each member of the sound crew has a middle initial, which successively spells out "C A S U A L", the tag line during the film.
The soundtrack was composed and recorded by Eddie Van Halen. Only three future Van Halen songs ever came from the music in the movie. One is "Good Enough" from 1986's release - 5150. The second is "Right Now" from the 1991 release For Unlawful Carnal Knowledge. The other, "Blood And Fire", didn't appear until 2012's "A Different Kind a Of Truth" album.