The scariest part of director Andy Muschietti’s Mama is – obviously – the entity know as “Mama.” But what’s scariest about the character is that it’s not all CGI, but instead played by a Spanish actor named Javier Botet, who can do things with his 6’8″ frame that most can’t.

“He doesn’t move like a normal, human, flesh-and-blood person would,” Jessica Chastain, who played Annabel in the film, says in the exclusive clip above from the film’s upcoming DVD release. “What he can create it really feels like it’s from another planet.”

Based on the kisses she gives him in the video, however, Chastain, clearly wasn’t too scared of Botet off-camera. But playing what executive producer Guillermo del Toro calls “a [Italian artist Amedeo] Modigliani painting left to rot” had its challenges, including spending hours in make-up and being strung up on set to be flung through the air.

“Sometimes I want[ed] to get out the mask, to breathe, to see well,” Botet says in the video of the prosthetics he had to wear to play Mama. “Because a lot of time I have very little way to see.”

Find out how to the filmmakers turned Botet’s performance into a horrific ordeal in the clip above. Mama comes out on DVD, Blu-ray and combo pack on Tuesday.