Anyone have any idea why the stock took a dive today?

There's actually a bunch of 30-cent stocks that took a drubbing today... another one that I had wanted to buy into, which surged from 32 to 38 in days, also took a big dive today. They're copper, not gold... so is this just a day where the big money is taking everything out of junior miners in anticipation of something bad?

Meh, I dunno.