Not Quite Right

A most amusing story was recounted to me over lunch. A friend of a friend (we'll call him "B"), had to get his boss to deliver a package. So B wrote the address, 30 Some Street, Some Suburb, on the package, and his boss collected it.
A little later, his boss rang: "The numbering on this street is all screwed up. It goes 29, 31. There's no 30." Needless to say, B's answer was along the lines of, "Have you tried turning around?"
And it gets better. On returning to the office, the (very embarrassed) boss told B, "Before I called you, I knocked on the door of number 31, to ask where number 30 was. It was a little old lady. And she said she didn't know."

Some muvvers do 'ave 'm.