And you know what's really funny about this whole debate, looking back at that video by Jim Cramer... A widely believe reason for the May 6th "flash crash" was the improper execution of a large S&P futures order by BarCap. This was not a crash generated by computer algos... in fact, its quite the opposite. Rather than using an algo to break up the order, and thus minimizing the impact on the market and average execution price, some idiot hit the "sweep" button instead (which hits every bid until the order is completely executed).
