About twenty years ago, I was back 'up north', visiting my parents. Anyway, a Police car pulled out of a side road as I passed, followed me for about four miles, including some turns at junctions and traffic islands, then pulled me over. Mr. 'Plod' walks up to the driver's side, indicates that I should lower the window, sticks his head in and says, 'Hi mate, how you doing? Haven't seen you for about twenty years'! Turns out it was an old school friend and one time neighbour, who had joined the Police, then done a stint with the Hong kong Police for a few years, and, as I'd moved from the north, I had lost touch with him!