11Dementors

Dementors from the Harry Potter series were inspired by J.K. Rowling's bouts with clinical depression.
12Candyman

Actor Tony Todd put actual bees in his mouth while filming a scene for Candyman.
13Pennywise

The droopy lip and lazy eye of Pennywise, the clown in “It” wasn’t CGIed; Bill Skarsgård who played Pennywise did it on command.
14Gremlins

The monsters from the movie 'Gremlins' were thought to represent the negative stereotypes of black people.
15T-1000

The T-1000 evolving noise from Terminator 2 was made with a condom covered microphone stuck into a flour/water mixture.
16Xenomorph

The inner mouth of a Xenomorph from Aliens is called a pharyngeal jaw, and Moray Eels have them.
17Frankenstein

The "bolts" in the Monster's neck in Frankenstein (1931), are actually electrodes. One is positive and the other, negative.
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18Jabba The Hutt

Jabba The Hutt puppet was 2,000 lbs, took 3 months to build, 3 men to operate and cost half a million dollars to construct.
19Godzilla

Godzilla's iconic roar in its first 1954 movie was created using a leather glove coated in pine-tar resin and rubbing it against the string of a double bass.
20Imhotep

Imhotep, unlike his movie counterpart in "The Mummy", had a respected reputation. He is considered to be the world's first architect, engineer, and doctor. He was also: Chancellor of the King of Egypt, Doctor, First in line after the King of Upper Egypt, Administrator of the Great Palace, Chief Carpenter, Builder, Chief Sculptor, and Maker of Vases in Chief. He was also the author of the first Egyptian medical treatise that was completely devoid of magical thinking.
