i started to flick channels mindlessly ; a house was being made-over in an hour by a squad of colour co-coordinated 'workmen ' ; flick ; a slow motion shark tossed a seal up in the air before swallowing it in a single merciless bite ; flick ; the burnt out shell of a bus ; flick ; a skinny white rapper standing in a corn field with a windmill turning behind him ; flick ; the scottish space agency shuttle rob roy v was descending through the clouds .