A still from an upcoming short film on sleep paralysis by filmmaker Carla MacKinnon about sleep paralysis, a phenomenon where people wake up with frozen muscles and, often, scary hallucinations.
Sleep Paralysis Still
MacKinnon's film, set to screen in May, is funded in part by the Wellcome Trust.
Frozen in Sleep
Actress Anne-Sophie Marie plays a sleeper beset by paralysis in Carla MacKinnon's upcoming short film on the spooky sleep disorder.
As part of her sleep paralysis film project, MacKinnon researched cultural myths about demons and ghouls often blamed for the condition.
Sleep paralysis is often accompanied by the sensation of suffocation or an attack by a malevolent force.
Sleep Paralysis Event
The Sleep Paralysis Project event at the London Short Film Festival in January, 2013.
Stephanie Pappas, Live Science Contributor
Stephanie Pappas is a contributing writer for Live Science. She covers the world of human and animal behavior, as well as paleontology and other science topics. Stephanie has a Bachelor of Arts in psychology from the University of South Carolina and a graduate certificate in science communication from the University of California, Santa Cruz. She has ducked under a glacier in Switzerland and poked hot lava with a stick in Hawaii. Stephanie hails from East Tennessee, the global center for salamander diversity. Follow Stephanie on Google+.