Dolly (equipment)

Here at 0.24 is an examply of dolly equipemnt being used. A dolly is a cart which travels along tracks. The camera is mounted on the dolly and records the shot as it moves. Dolly shots have a number of applications and can provide very dramatic footage. I think it was used here to create the sense that a exciting journey is going to happen as it is a trailer, and it well help draw in the audience.