This trailer works well as a quick teaser as it doesn't give anything away about how they get up there, why they are still there and what will happen within the film as it doesn't seem like an advanced plot. I think the way the voice over works with certain dialogue for the characters is interesting and works really well to help create a fast pace and tension. Fast pace is a key thing for a teaser trailer i feel short clips work better then having scenes from the story as you don't have enough time to explain the main film plot- just include effective scenes which will make the audience think.
