This shot is very interesting as we see the character entering and exiting the shot which shows the audience that she is a lead character.
This shot uses overlaying to create a blurred effect, this suggests that this scene may be a memory or a figment of the characters imagination, this also gives us a hectic and rushed atmosphere.
In this shot the characters head is cut out and the focus is on the characters hand which leads the audience to believe that what is in her hand is important, it also create suspense the audience becomes curious as to what is in her hand.
In the scene the audience become aware of what is in the characters hands (a key). The close up shot of the key gives us the impression that the key is important to the plot.