Unless you were trapped in a Chilean coal mine, you might have heard that General Motors started selling its shares again today. Big ups on dustin' off your shoulders, General, but putting your shares back on the market means there a few million sets of eyes looking over your every move, wondering what's next. And as this chart shows, by the end of the day, the euphoria has already started to wane. Another general, Generallissimo Spiegel, used our chart of the 2010 F1 season to teach another lesson. You might have to think on this one a bit: