Chuck Russell and Frank Darabont didn't have a lot of rules for the blob, but they agreed the general concept of the creature was it being an inside-out stomach meaning the acid is burning, melting, and devouring almost everything it touches.
Chuck Russell is a big advocate of storyboarding shots in advance. "When I first came to California, I gate-crashed Universal when Hitchcock was still working, went into Hitchcock's office, said I'm here to see Mr. Hitchcock, and I could see him working with a storyboard artist."
Chad McQueen was offered the part of Brian Flagg but turned it down. He did so due to disliking the script...and to having a strict personal policy of never performing in any production based on, or inspired by, his actor-father Steve McQueen's work.
Donovan Leitch Jr. (Paul) took Shawnee Smith (Meg) to his senior prom at Hollywood High. He wrote her a thank you note afterward, which she kept for years. They later appeared together in this film.
Of the film's $19 million budget, $9 million went toward visual effects.
Chuck Russell: As a theater patron in the second row, left of center, during the wide shot of the theater audience reacting to an on-screen fright.