The Incredible Petrified World

Phyllis Coates accepted the role of Dale Marshall as a favor to director Jerry Warren, who was a former boyfriend; the actress originally cast in the lead couldn't do it and Warren couldn't find anyone else in time. He convinced Coates to do it by telling her that the film would not be shown in California. However, after it was completed, she found out that Warren did indeed release the film in California, and she was told by at least one studio executive (at Columbia) that the film was so inferior and shoddy that the studio would not be hiring her again. On top of that, Warren never paid her.

When the characters are trapped undersea in the diving bell, they simply leave by climbing up to a hatch, supposedly at the top of the bell. Such an action underwater would immediately flood the bell. Yet, not even a drop of water enters the bell when they exit.

Edited from Sul sentiero dei mostri (1940)