Little Shop of Horrors (film) would pantomime and lip sync in slow motion. The film was then sped up to the normal 24 frames per second and voices were reinserted in post-production. Levi Stubbs' recordings were run through a harmonizer when slowed down so that they were coherent for Moranis or Ellen Greene. There are no blue screens or opticals involved in any of Audrey II's scenes, with the exception of the reshot ending where the plant is electrocuted, designed by Visual Effects supervisor Bran Ferren, and in some shots during the rampage in the original ending. The plant was made in six different stages
The Little Shop of Horrors Company yard for an entire evening using two bottles of scotch as persuasion. The scene in which a character portrayed by Robert Coogan is run over by a train was accomplished by persuading the railroad crew to back the locomotive away from the actor. The shot was later printed in reverse. Griffith and Welles spent a total of $1,100 on fifteen minutes worth of exteriors. The film's musical score, written by cellist Fred Katz, was originally written for "A Bucket of Blood". According to Mark Thomas McGee, author of "Roger Corman: The Best of the Cheap Acts", each time Katz