public void bounce(rj entity, int i, int j, int k) {
    et world = ModLoader.getMinecraftInstance().e;
    //ja sand = new ja(world);
    if ((entity instanceof kw || entity instanceof gz || entity instanceof ja
      || entity instanceof pw || entity instanceof EntityC4Primed) && entity.aO < 2.0D && !entity.t()) {

      int count = this.countAdjacent(entity.aG, i, j, k);
      double mult = Math.min(bounceCap, getBounceFactor(count));
      double ymot;

      if (entity instanceof gh && !mod_PlasticCraft.isWearingFallBoots) {
        ymot = 1.0;
      } else if (entity instanceof kw && !((kw)entity).ax) {
        ymot = 1.4;
      } else if (entity instanceof ja || entity instanceof pw || entity instanceof EntityC4Primed) {
        ymot = 1.2;
      } else {
        ymot = 2.0;
      }

      entity.aO = initfac * ymot * mult;
      entity.bi = -(float)getHeightForVelocity(entity.aO);
      if (entity instanceof ja) {
          ja sand = (ja)entity;
          sand.b = -(int)getTicksUntilRebound(entity.aO);
          sand.aV = true;
      }
      entity.aN *= horizDamp * getBounceFactor(count);
      entity.aP *= horizDamp * getBounceFactor(count);
    }
  }