The Little Shop of Horrors was interested because of "A Bucket of Blood" and said the development process was similar to that of the earlier film, when he and Griffith were inspired by visiting various coffee houses: We tried a similar approach for "The Little Shop of Horrors", dropping in and out of various downtown dives. We ended up at a place where Sally Kellerman (before she became a star) was working as a waitress, and as Chuck and I vied with each other, trying to top each other's sardonic or subversive ideas, appealing to Sally as a referee, she sat down at the table
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