Can almost beat that .... one cold Winter's night, door bell rang. Hubby and I both at the door, opened it and in the darkness made out two grotesque figures (in fancy dress) laughing at our amazement - speaks one "Hiya, don't we look good, don't you recognise us?" Me - "Er no, who are you?" Them - "O come on, don't be daft, let us in, its freezing out here" Still much laughing and teasing us to come in. "Is so-and-so here yet?" Suddenly second figure glances at house number - hand over mouth, gasps "O good grief, we are at the wrong house, so sorry!!!" Exit two embarrassed people, us laughing on doorstep ................ never did find out where the party was held!