When I discover after one or two tests that it is not going to allow itself to be tempered, I throw it on the scrap heap and sell it for a cent a pound when the junk man comes around.

Steve Ballmer, Microsoft's chief executive, once told a conference that Bill Gates is the most spammed man in the world, with 4m pieces of email arriving in his inbox each day, most of it junk.

Waters says there were some scenes his leading man forced him to junk.