At the very beginning, the whole project was supposed to be a 60-seconds video but, judging it to be too brief, the director developed the story in a 15-minutes short film.
At the end of the first draft of the screenplay, the girl killed herself. The scene of the bandage was added during one of the last rewrites because the director felt it would be more disturbing to have the girl still alive after the suicide attempt.
The director cut his fingers preparing the scene with the broken glass.
There is no dialogue. We can hear Claudia Soberon's voice only when she is screaming and crying.
Francesco Roder wrote the scene where the girl breaks the glass and screams after Jennifer Connelly's scene in A Beautiful Mind (2001).