Why does the Goat dance?

Once upon a time in the land of Arabia, there lived a goat herder named Kaldi. Kaldi was a sober, responsible goat herder whose goats were also sober, if not responsible. One night, Kaldi’s goats failed to come home, and in the morning he found them dancing with abandoned glee near a shiny, dark-leafed shrub with red berries. Kaldi soon determined that the red berries caused the goats’ eccentric behavior, and soon he was dancing too.

Finally, a learned imam from a local monastery came by, sleepily, no doubt, on his way to prayer. He saw the goats dancing, Kaldi dancing, and the shiny, dark-leafed shrub with the red berries. The imam subjected the red berries to various experiments. Soon, neither the imam nor his fellows fell asleep at prayers, and the use of coffee spread from monastery to monastery, throughout Arabia, and from there to the rest of the world.