It sets the mood for the scene or part of the story you are currently engaged in, it draws you into the book by having you feel how the author wants you to feel at that moment in the story.
This should've been posted in business. Yes you can possibly get fired for not being friendly enough, you can often get complaints and your boss may get tired of all the complaints and you could possibly get fired. It really depends on the companys policy and how your boss is.
A mother is awoken in the night by a clanging doorbell and flashing lights.
