You stand on the top of the valley. Down, far below you, you see a brook, windind it's way through the valley. As you are thirsty you go down there. And while the wind are blowing upon the green fields you suddenly notice a deer. Standing on the other side of the valley, it's carefully watching you in case you'll do something threatening. You reach out your empty hand to show that you mean no harm. But as you reach out your hand towards it, it seems to be aware of something else. Because it suddenly turns and starts running away from you, and ....