So, unfortunately I was stopped out of my positions in Expedia and Mattel when the Dow mysteriously dropped 9% and then jumped back up in the span of 20 minutes last Thursday. Here's the USA Today's take on that event - http://www.usatoday.com/money/markets/2010-05-10-mart10_ST_N.htm .
I'm not going to let this keep me from trading though. I'll wait for another confirmed uptrend and get back in the game. Have a good one and good luck.
Disclaimer: Please only use this information with a grain of salt and at your own risk / for educational purposes. I am not an investment advisor so please seek professional help if that's what you're looking for.