Is sky diving similar to stock market ride? Biggest Drop in 3 months in May 2010

This may sound funny on the first read. But really, is the stock market ride similar to sky diving? Wondering why I say that? Well check out the market from today, there was blood everywhere! Dow Jones slipped by 224 points or or 2.02%. Please keep in mind that its the steepest drop in the market since Feb 3. Reasons for this sudden drops can be attributed to Greece crisis, Goldman Sachs crisis and several others.