The nation is facing a dramatic and perilous economic binary event: the fiscal cliff. Do we plunge over, or do we find a compromise? According to Motley Fool analyst Blake Bos, sometimes taking the plunge isn't so bad for your investments. He discusses which companies may lose a lot of valuation as shares sell off because of fears of spending cuts, and why that may be just the right time to dig through the rubble and get in on great companies, before they inevitably rise back up. He also gives us some indicators that could show that some companies with big post-apocalyptic sell-offs may be best left alone.