Holmes and Watson go out camping.

Sherlock Holmes and his good friend Dr. Watson decide to make a trip to the countryside and go camping.

In the middle of the night, Sherlock wakes up Watson and asks him:

"John, look up at the sky. What do you see?"

Watson, still sleepy, slowly arranges his thoughts:
"The... stars? Well, from an astronomical point of view, I can tell you that North is this direction and that according to the position of the Pleiades it must be around two in the morning, give or take."

Sherlock: "Go on..."

"Eh... the Milky Way can be seen without aid, which tells me there is no light pollution - we've wandered pretty far from civilization."

Sherlock: "What else?"

"There are a few little clouds and a slight breeze - westward wind, we might be in for some rain tomorrow."

Sherlock: "Anything else?"

"Well, the stars seem to be flickering more than usual, which is only an illusion caused by air currents in the atmosphere. We could be in a low-pressure area within the next two days. That's all I know -- why, what does the sky tell you?"

Sherlock: "It tells me that someone stole our fucking tent!"