Editor’s note: Some images below might be considered disturbing.

If you’ve seen the previews for Guillermo del Toro’s latest horror film “Mama,” you know you’ll probably never call your mother this endearing derivative again without the creepy child-whispered version crossing your mind. You also know that the scrambly movements of a wraith-like character in unreal bodily positions makes it appearance in this film as well.

In fact, characters such as this, usually portrayed as a female, have been cropping up in horror movies for the last few years. The video for a motion test from “Mama” with actor Javier Botet gives you an inside look at their making — if you can handle it.

Video of Motion Text With Actor Javier Botet Who Has Marfan Syndrome For Guillermo del Toros Mama

(Image: YouTube screenshot)

Video of Motion Text With Actor Javier Botet Who Has Marfan Syndrome For Guillermo del Toros Mama

(Image: YouTube screenshot)

Video of Motion Text With Actor Javier Botet Who Has Marfan Syndrome For Guillermo del Toros Mama

(Image: YouTube screenshot)

The male actor providing the movements for the ghostly character, from which the film gets its name, is effective in part due to his extremely thin frame, which is the result of Marfan syndrome, according to io9.

The NIH describes Marfan syndrome as a genetic disorder that prevents the building of connective tissue and also causes very lengthy long bones, like legs and arms.

Watch the clip to see how Botet’s physique gives him an eerie air (Content warning: images might be considered disturbing):

Here’s the trailer for “Mama,” which is in theaters now (Content warning: images might be considered disturbing):