‘A crane fell on top of me in Kladno in 1952, after which my writing got better,’ Bohumil Hrabal (who died in 1997) once wrote, with typical self-deprecation and comic timing; but there are other versions of what made him change from being an almost rococo engineer of magic realism (‘building my house from the roof on down’, as he put it) to the flawlessly brisk comic writer he became.