We should be surprised?

Look at the plot for 37 years, and tell me that recent Wall Street activity and plummeting Dow Jones Industrial Averages should be considered unusual or unexpected, because I sure don't see it that way.

Graphs of "most recent data" are a composite Dow Jones Industrial Averages derived from Wall Street Journal (wsj.com) on October 9, 2008; note that the values on Y-axis are not constant.