Cannock Chase? You weren't dogging near Nine Gate or Brindley were you? You weren't in a lime green Vauxhall Chevette, by any chance? If so, I was the one peering in through your rear quarter panel, holding my maglite in my left hand. I bet traces of my DNA are still on your petrol filler cap. Yer wife's backbox is spluttering a bit...but those big bore exhausts do tend to splutter. Maybe you should trade her in for a new model?