@Override
	public SingleObject create() {
		where+=xvel;
		xvel+=rand.nextBoolean()?3:-3;
		xvel*=Math.abs(xvel)>10?0.8:2;
		xvel*=0<where && where<stage.getWidth()?1:-1;
		return new TornadoPart(where,stage.getHeight()-90,rand.nextInt(8));
	}