Chester Folk Festival Circa 1981 A Cockroach circus was on the bill. The Barn in which they were to perform was packed - everybody wanted to see this!! They were late starting .. very late.... slow hand claps and crying children. And when the handlers arrived they were wearing white lab coats. The act consisted of large ( 2inch ) Cockroaches with pieces of blu tac stuck to their back. Pieces of string were stuck to the blue tac and short lengths of bamboo enabled these lab technicians to use the live cockroaches as kind of living puppets. Higlight of their act was a re-enactment of the Battle of Britain - with cockroaches in front of a backdrop of cloud covered cardboard while a cassette played the Dambusters march. The cockroaches kept coming unstuck from the blu tac and falling to the ground (No parachutes were provided) The act was terrible - not even funny at the time. And I have never seen an audience at a folk event become so hostile. And then the guys in white coats happened to mention that during the day they actually use these cockroaches in their experiments at an animal testing lab..... I think they got out alive.