here because -- >> a desperate person could react. >> yes, exactly. what happens is they become physically tired, they become more confused, the pressure builds to control the situation, hostages are escaping, the police are putting the psychological pressure on him. they get hungry, they get thirsty. this builds up to a cup my nation as to where they start to acquiesce to police suggestions of surrender or move in the other direction and become violent. in this case he appeared not very happy that additional members of the hostages escaped. >> juliette kayyem is still with us. juliette, overnight there was a news conference with the commissioner of the police in new south wales who spoke directly to the hostages and said "we are going to take care of you. i want you to know that our only here is to get you out safe ly.