The filmmakers had to get approval from Lysol to have Frank spray away the stench of death with their product. "They liked the idea that Lysol would kill any conceivable odor."
The shot of the barrel corpse (nicknamed Tarman) changing through the glass panel was done with a wax face over the skull and heat turned up to melt it. The glass cracking was unintentional and happened due to the heat.
In an unprecedented move, a fan of the film started an internet campaign to get the movie released on DVD. Going beyond simple fan petitions, Michael Allred created a web page consolidating every bit of news relating to the film, and contacted many of the film's principals including the writer and director Dan O'Bannon. He went on to put O'Bannon in touch with MGM (the studio that owned the film) and work began on getting the film released on DVD. O'Bannon and others who worked on the film credited Allred and his campaign for getting the movie released on DVD.
On the back of Freddy's jacket, in the theatrical version, the words "Fuck You" are displayed. After realizing that the shot could not be used in case it was ever shown on TV, a second jacket was made that says "Television Version" and can be seen in the TV version of the movie.
Some of the zombie extras were paid bonus to eat real calf brains in the film. Dan O'Bannon ate some raw calf brains first in front of them, to show that he wouldn't ask them to do anything he wasn't willing to do himself.