Sherlock Holmes & Dr.Watson once went on a camping trip. They climbed a hill and set up their tent there. After a few hours they decided to hit the hay. As they lay down Holmes asks Watson, "Watson, as we look up at the night sky what do you notice?" With a hope of impressing Holmes, Watson says,"Oh, I can see the moon, the stars & the constellations - the Ursa major, Orion's belt, Lira.....", and he went on.
After waiting few moments holmes says,"Watson! you missed my point. We can see the stars because someone just stole our tent!!!"