The Demogorgon in Netflix’s Stranger Things is the sort of monster that makes an impression. Cosplayers have replicated the monster with prosthetics and makeup, and I’ve seen sculptures of the fearsome creature from the Upside Down. But how did it work on the show? Visual effects house Spectral Motion contributed to making the Demogorgon terrifying and used some practical effects in the process. They’ve shared some behind the scenes photos showing the suit and you can watch a video featuring the animatronic head test on Facebook. You can also see more behind-the-scenes looks at the demogorgon in this album.