Distraction, so he followed a sign to Smithfield market and the wonder locals know as Mavis Pavis and her amazing pie throwing machine. Essentially Mrs Pavis, aged 43, has a lot of surplus pies at the end of an average day and so she has developed her pie cannon, a machine that fires beef, chicken, or apple , pies into the air, for an expectantly waiting crowd of dogs and Londoners, to do with as they choose.