'Fallout 3 Short Film: Population 1' Analysis

'Fallout 3 Short Film: Population 1' is a short, fan-made 'Fallout 3' film, by Pwnisher (YouTube name).

One of the things that I am inspired by in this short film is the non-diegetic sound used from about '1:21' to '3:00'. This noise prevents the audience from feeling completely comfortable and relaxed, and it helps to build tension as though to subtly imply that something bad could happen at any moment.