A friend of mine once drew me a line which was a map of the M25 with little nubs representing the A2, A13, A12, M11, A10, A1(M), M1, M40, M4, M3, A3, M23, A22 and A20, and invited me to finish it in one circular motion. A good half a g, it was. It was gone before you could say, 'Hold on, are you sure you're not going to OD?'
