The name of the TV channels that shows on the TV, are named in honor the 'company' name.
Alice:
What do you want from me?
The Man:
Blood.
In the prologue, when the camera gets in the house, we can see a keys on the couch, and then, the keys are no more there.
The name's director Nicolás de Jesús, can be seen more than 15 times between the opening titles and the end credits
An alternate ending for the film, shows the camera crossing the window, and travel to the exterior gardens of the house, showing a change of times and a title saying "MANY TIME LATER", and we can see a man lying in the backyard, with a women trying to wake up him. The movie will be ended, in the time that the man open his eyes. This was confirmed as the beginning for the second film.
Spanish