A cumulative disaster scenario in the tradition of ""for want of a nail. . . ."" Here it's all speculation, with a little boy returning a caged mouse to the seller because ""A cat might come in and chase the mouse."" Then a dog would come and chase the cat, and this in turn would bring a dog-catcher, the dog's owner, the riot squad, a rescue team (firemen with hoses), news reporters, and (with guns and tanks) the army and navy. Then (by parachute) the air force would come and ""TERRIBLE THINGS WOULD HAPPEN""--as pictured, the terrible thing is a giant red explosion. It's a bomb all right--the strident pictures pile up grimly as the text plods mechanically along.