Put all baggage on the conveyor belt . Walk through the detector age one at a time , please .   Excuse me , ma'ma . Could you walk back through the doorway again , please ?   What for ?   Airport security . Could you empty your pockets over here , please ?   Really ? I'm in a hurry . All right .   Ah , a set of keys .   I'm embarrassed ! I forgot completely about them . I'm terribly sorry .   That's all right . Enjoy your flight .   Thank you . 