It is said that when inventor Robert Phillip Chambers first proposed the idea of the spiked bomb to General Eisenhower, the unflappable commander simply looked at him and responded: "well, why not?" The O-15 "Bomb, High Explosive, Mechanical" went into production in 1944. One-and-one-half times the size of an average man, the bomb was designed to be dropped out of airplanes, whereupon it would roll toward its targets with the aid of a gyroscope.
The drawing here is a post-war artists' impression of the Nivreville Incident, when several light bombers carrying the weapons discharged on top of the German 15th Infantry Division. The carnage was reportedly so great that when Eisenhower saw aerial photos of the battlefield, he turned white and ordered the bomb never be used in combat again.