Analysis of a scene from 'Hanna'

From the sound we learn a lot about the character, Hanna. The footsteps at the beginning symbolise that she is in a secure place. She then starts crying to show that she is scared and showing her innocence. The handle then starts to spin and slowing starts to turn into non diagetic background music. The music almost starts to trigger her killing spree. The background music sounds as if it is matching her heartbeat and gets faster and faster as she begins to reach her freedom. There is also a diagetic sounds of an alarm in the background, contradicting the once secure enriornment at the beginning and making is seem insecure.