The act of saying "yes" to something someone has said to you after you have already stated you didn't hear the first time. You don't want to ask to hear again, so you just hope it isn't a question that will embarrass you by saying "yes" by.
When the nostalgia is so heavy, that you start to cry and regret the present. We all have had this feeling and always will do. You imagine the old parks and memories. Yeah, it was a great time, wasn't it?