He asked Colville, “Will they do us any damage when they explode?” “I shouldn’t think so, Sir,” Colville said. “Is that just your opinion, because if so it’s worth nothing,” Churchill said. “You have never seen an unexploded bomb go off. Go and ask for an official report.” Which reinforced for Colville the folly of offering opinions in Churchill’s presence, “if one has nothing with which to back them.”