I like many different elements in this video and i think they all add up to make this trailer very good. One of the elements is the quick shots almost every single shot lasts for about 3 seconds apart from one where there is a shot which lasts for a little longer and this was to put emphasis on the knife in that clip. Also as the trailer gets further in the music becomes more upbeat building tension and the clips get faster changing on every beat. Also at the start of the trailer they use odd silences to emphasise on tension to make the viewer become more involved and more hooked to watching the clip because they want to know whats happened or happening. They also use the voices of the characters to tell a bit of the storyboard to give the viewer a hint as to what the film is about. They use a clip at the end as well which says "if your not one of us, your a victim" this gives a message/ moral to the viewer this is not only to give them an idea as to what the film is about it is also to entice them into wanting to watch the film as they don't know yet what this quote means unless they watch the film.