They say that apprentice craftsmen always kept their tool in their hand when they came for a short nap on top of this rock. In this way, they had time to doze off until their hand relaxed to the point of dropping the tool. The noise it made as it hit the stones below would wake them up so they could go back to work.
Although this practice was liable to damage the equipment, the master craftsmen would look the other way, for they knew well that it is a better tool that has been charged with the user's dreams.