I watched Donnie Darko a few days ago (great film) and it had a fantastic song in it at the end that is incredibly haunting.
Called "Mad World" by Gary Jules, it's a remake of a Tears for Fears song. You can here it here:
http://www.multimedia-search.com/download_mp3/Gary_Jules_Mad_World/26376/
All around me are familiar faces
Worn out places, worn out faces
Bright and early for the daily races
Going nowhere, going nowhere
Their tears are filling up their glasses
No expression, no expression
Hide my head I wanna drown my sorrow
No tomorrow, no tomorrow
And I find it kinda funny
I find it kinda sad
The dreams in which I'm dying
Are the best I've ever had
I find it hard to tell you
I find it hard to take
When people run in circles
It's a very very, mad world, mad world
Children waiting for the day they feel good
Happy Birthday, Happy Birthday
And I feel the way that every child should
Sit and listen, sit and listen
Went to school and I was very nervous
No one knew me, no one knew me
Hello teacher tell me what's my lesson
Look right through me, look right through me
And I find it kinda funny
I find it kinda sad
The dreams in which I'm dying
Are the best I've ever had
I find it hard to tell you
I find it hard to take
When people run in circles
It's a very very, mad world, mad world
Enlarging your world, mad world