This suspense build is just as the title suggests. There is tension in the strings that builds gradually, much as you might have heard in Hans Zimmer score for the Dark Knight. The sound is manipulated to create skin-crawling rising intensity. Adding to this ambient and spacey terror, there are trombones in the distance creating glissandos that really grate your teeth with a feel of imminent doom. There is also an accompanying percussion track so that you can really feel the heartbeat pulse driving forward to the crash at the end. This tune would be perfect for a piece of media that really needs to scare the audience, maybe for halloween or a scary film/video thriller.