Possible sounds

Breathing:
http://www.freesound.org/tagsViewSingle.php?id=1322&start=15
http://www.freesound.org/tagsViewSingle.php?id=1322

Breath.wav
L_mb-breath-1 004.aif
L_mb-breath-1 005.aif
L_mb-breath-1 013.aif
L_mb-breath-1 016.aif
L_mb-breath-1 022.aif

Atmospheric sound:
http://www.freesound.org/samplesViewSingle.php?id=33987


Park sounds:
http://www.freesound.org/samplesViewSingle.php?id=18765

Music played in the flashback:
http://www.youtube.com/watch?v=Tbk16dKSGGA

Transition to flashback:
http://www.freesound.org/samplesViewSingle.php?id=21920

During flashback, music playing with voices over:
http://www.freesound.org/samplesViewSingle.php?id=39470