@Override
 public void move(int step) {
   if (state == FLEEING) {
     GameScene.add(Blob.seed(pos, Random.Int(5, 7), Web.class));
   }
   super.move(step);
 }
  public static void trigger(int pos, Char ch) {

    GameScene.add(Blob.seed(pos, 300 + 20 * Dungeon.depth, ToxicGas.class));
  }