Mamá is among the creepiest things I’ve seen so far. (And to think- it’s only 3 minutes long!) Not watching that any time again soon.
Interestingly, this inspired the mainstream director Guillermo del Toro to make it into a full feature film, too.
Directed by Andrés Muschietti
On Youtube, with an intro from Guillermo del Toro:
Mamá, on Youtube
Mamá is a Spanish-language short film about two girls trying to avoid Mamá. With English subtitles.