What to say? “Look, I’ve given you a lot of information here and there is no need to rush, so why don’t you take a few days to consider everything I’ve told you and then we’ll take it from there.”
When to use it? When you’re dealing with a patient who has been given serious information to digest or a customer who is simply being difficult for whatever reason. Such a break gives you and the customer a chance to move beyond an emotionally charged conversation.