how does Brom Bones use Ichabod Crane's superstitious nature against Ichabod Craner?

Brom, short for Abraham, is Ichabod Crane’s greatest rival in the fight for Katrina’s hand. He is boisterous, burly, and the hero of the area, known for his heroics and feats of strength, for which he earns the nickname Brom Bones. He is especially for skilled on horseback. He is mischievous, but he is often motivated by goodwill. He is most likely the one in disguise as the Headless Horseman. Brom used Ichabod's superstition to pull off the headless horseman.