commodity prices where to from here

after seeing red for the last two days, i just want to know if someone can give me a realistic explanation of what is happening with global commodity prices.. has someone suddenly found a truck load of ore / copper / zinc or whatever else in their garage and that will sustain the world supply for the next year. i really can't understand it as i thought commodity prices were driven by supply / demand and i can't see where supply has skyrocketed and demand has plummeted... do developing countries no longer need metals?

secondly, copper for example is still above the 3 month buy price of a week ago, yet the stocks are getting hammered to below last weeks levels? why is this?

any advice / suggestions welcomed