The Resident Evil movies should have featured...
... the soundtrack of this movie!
The camera work and the amazing, creepy, under-the-skin-crawling soundtracks is what really gets you here. The music really resembles the OST of the classic Resident Evil games, too bad Hollywood wasn't smart enough to pay attention to such an important aspect.
Overall, 13B rocked. I never watched Indian films before, but after such an experience I will surely look forward to any other horror instalmments they might think of!