Analysis of the trailer 'Silent Hill'

watch the full theatrical trailer here.. 
http://www.youtube.com/watch?v=f5mT5LhbRJw

I have researched psychological horrors and decided to do some research on Silent Hill (2006)

• a lot of the story line is shown before any writing/credits are shown
• the music gets louder and my intense as the plot comes to light
• the conventional aspect of a young child is used, as it could portray the loss of innocence
• the lighting is quite bright for a horror film, up until the last minute where it becomes darker
• use of "secrets" "it" and "darkness"
• possible ghosts and the unknown
• sound effects of a heartbeat or footsteps, which sets up tension
• at the start, it doesn't look like a horror film, as it shows a mother and daughter sat in a meadow