 Max says, "Gregor Samsa awoke one morning to discover that he had  been transformed into a giant cockroach. Nah, its too good." This  is a reference to Franz Kafka (qv)s "Metamorphosis". In another  Mel Brooks (I) (qv) film, _Spaceballs (1987)_ (qv), he makes  another obscure reference to this story during the "Mega