Simon,
I sent that song to my jw sis last year. When I asked her how she liked it she told me she did except that she didn't appreciate the happy birthday part. Oops!
The odd thing for me is that my daughter sent me the MP3 about the time I went to see The Pianist. So for me the song reminds me most of that movie rather than Donnie Darko. Think about it though, it really does fit The Pianist in lyrics and because of the piano in the arrangement.
It's a very haunting song for sure. Another haunting song; Beethoven's 7th and the entire Tubular Bells, the nearly 26 minute version.
Flyin'