Sceptical investigators have asserted that the story of Spring-heeled Jack was exaggerated and altered through mass hysteria, a process in which many sociological issues may have contributed. These include unsupported rumours, superstition, oral tradition, sensationalist publications, and a folklore rich in tales of fairies and strange roguish creatures. Gossip of alleged leaping and fire-spitting powers, his alleged extraordinary features and his reputed skill in evading apprehension captured the mind of the superstitious public—increasingly so with the passing of time, which gave the impression that Spring-heeled Jack had suffered no effects from ageing. As a result, a whole urban legend was built around the character, being reflected by contemporary publications, which in turn fuelled this popular perception.