What is he doing during the murder montage? (SPOILERS)
SPOILERS BELOW
During the scene in which Malvern kills Deborah, they cut back to David gradually approaching a curtain with a folded newspaper in his raised hand. I liked the montage but what is David doing in this scene? Is he actually trying to kill a fly or a mosquito? (because that is what it looks like). Is there any significance for this?