The song, One Winged Angel, is from the soundtrack of a Japanese video game , Final Fantasy VII. Instead of having a creepy theme like some of the other songs, this song provides a tense feeling. Now, fear is caused by danger, and the feeling of danger is very present throughout the song. Imagine that you are struggling in a fight against a strong foe. Now as the song progresses, he is steadily gaining the advantage, and his strength is putting you against tremendous pressure.
http://www.youtube.com/watch?v=Yn71hIsm0U8