Seems to be common here. Different theories surround the event, but likely MM's settling up. Some say the same thing happened before the last run. Myth or legend, who knows? If you get a solid answer to the question, a lot of us would like to be filled in. I actually read about two hours worth of posts on this topic, all in conflict with each other while claiming MM experience and expertise. All I got from that was one of those confusion headaches, and the opinion that even MM's are amateurs trying to be professionals. Good luck!