Horror Teaser Trailer analysis Horror trailers normally tend to start of slow, this is to help the audience settle in, so that they don't expect what is about to come next. They do this by having slow eerie music at the beginning which helps the set the mood and atmosphere. Then after there is a climax which alerts the audience, making them unsettled. this is done by increasing the pace of the music and also adding jump scares to the trailer. Then after the trailer goes back to being slow, however the audience are still unsettled, as the are unaware of what is going to happen next.