protected int strikeAdditionalScore() {
		int nextFrameScore = 0;

		nextFrameScore = getNextFrame().getFrameScore();

		if (getNextFrame().isStrike()) {
			if (getNextFrame().getNextFrame() == null) {
				nextFrameScore = getNextFrame().getFrameFirstScore();
			} else {
				nextFrameScore += getNextFrame().getNextFrame()
						.getFrameFirstScore();
			}

		}

		return nextFrameScore;
	}