Continuity mistake: When Fritz is trying to steal a brain, he gets scared by a skeleton, which he grabs down, causing it to bounce up and down (since it is hanging from a hook up on the ceiling). But in the next shot, the skeleton is hardly moving. Yet when Fritz realizes he has dropped the brain, the skeleton is bouncing up and down again. (00:08:40)
Trivia: Universal Pictures originally wanted Bela Lugosi to play Frankenstein's monster since he had done such a great job playing Count Dracula earlier that year. But Bela turned the role down because he did not want to be 'hidden' under all that make-up. Yet 12 years later, Bela would play Frankenstein's monster in 1943 film 'Frankenstein meets the Wolf Man'.
Henry Frankenstein: Dangerous? Poor old Waldman. Have you never wanted to do anything that was dangerous? Where should we be if no-one tried to find out what lies beyond? Have your never wanted to look beyond the clouds and the stars, or to know what causes the trees to bud? And what changes the darkness into light? But if you talk like that, people call you crazy. Well, if I could discover just one of these things, what eternity is, for example, I wouldn't care if they did think I was crazy.
Question: Why in this movie is Mr. Frankenstein's first name Henry and not Victor (like it is in the book)? If it was changed to Henry so it would not be confused with the Frankenstein's family friend Victor Moritz, why not just call Moritz something else, and keep the original name of the main character in the movie?