Terror Trivia Tidbit

During preproduction of "Bram Stoker's Dracula" (1992), director Francis Ford Coppola came up with the idea that when in the presence of a being such as a vampire, the laws of physics don't work correctly. This is why shadows often seem to act independently of the figure casting them, why rats can run along a ceiling upside-down and why liquid drips up instead of down.
Source: IMDb