To make a fowl shot.
It was an exciting football game. It was also an unusual one. The score was seven to two. At the same time, not one man had managed to cross the goal line. But the game was played according to the rules. How is this possible?
You have bag, you put a lump of metal into the bag, then you put a lama into the bag, then you put something else into the bag, and yet the bag weighs nothing. Why?