Percy Lambert promised to quit motor racing once he won back the land speed record, but on Halloween 1913 his car flipped and he was killed. His death - alongside the many other racing fatalities - makes the famous Brooklands track an eerie place. Author Mark Richardson even wrote a light-hearted novel about the circuit's creepy reputation - The Ghost at Brooklands Museum.  But then a strange encounter on the tarmac left Mark wondering if he too had met Percy's unhappy spirit on the anniversary of the racer's death.