From the back of the box: For Professor Winston Nurfle, planes and zeppelins always seemed much too large. Instead, he felt that each man, woman and child should have their own flying propulsion unit. Finally, Nurfle stumbled up the perfect mixture of explosive chemicals to provide thrust for his jet pack. But now, with the wars consuming most research and development Nurfle has donned his prototype and gotten into the fight! He has vowed to prove the combat effectiveness of his invention!