That sounds more in keeping with the style of the dolores, i OST's than The second runner.
[checks]
Yup, there we go.
Its actually a track called Blue from the second dolores, i ost. Your version has had a minute cut off of it (hence such a sudden start) its actually 4:43 long, whilst the one you linked to is only 3:41.
Full version
http://www.youtube.com/watch?v=7NGBg-qIolY