This man knocks on Nelson Mandela's door. The maid opens and sees this guy with a clipboard. "" we have to deliver this truckload of car parts to this address"" he tells her. "" I'm afraid you have the wrong address"" she told him "" this is a private residence"" . With this, the man goes away but within an hour he is back, insisting that directions from the locals all referred to this address. To prove his point, he shows the maid the consignee details on his clipboard "" Nissan main dealer"".