It's one of the toughest aspects of the job to stay calm when you are fully aware of an emergency. It does amaze me though how far into denial some pax can sink though - a friend of mine had a 'slow' decompresson on a shorthaul flight a number of years ago - masks dropped, crew sat down and strapped in, emergency descent - while on portable O2 checking passengers one particular gentelman asked her when he could have another cup of coffee and at what time 'service' would resume!!!