@SubscribeEvent
 public void onCreativeFall(PlayerFlyableFallEvent event) {
   ZSSPlayerSkills skills = ZSSPlayerSkills.get(event.entityPlayer);
   if (skills.isSkillActive(SkillBase.leapingBlow)) {
     ((LeapingBlow) skills.getPlayerSkill(SkillBase.leapingBlow))
         .onImpact(event.entityPlayer, event.distance);
   }
 }