Riddle: A man rode his horse to the top of a high hill. He tied his horse to a large birch tree, and removed a blanket, a flint and steel for making fire, and a small hatchet to cut down a bunch of green saplings. He then gathered a bunch of dried leaves and took them, along with the green saplings, to an open area near some smaller rocks. Using the flint and steel, he tried to start a fire with the leaves and green wood. As the fire struggled to burn, the man did something remarkable. He suddenly took his blanket and covered the fire with it. Apparently, regretting his actions, he removed the blanket from the smoldering fire; but then, a few seconds later, he placed the blanket back over the fire. Again and again he repeated his actions of throwing the blanket on and off the fire. Was this man an obsessive-compulsive pyromaniac, or was there some kind of method to his madness?
Answer: The man was a Native American Indian in the old West who was sending smoke signals to his tribe.