Ask HN: What is happening on Mt. Gox right now?

http://www.bitcoin.clarkmoody.com/ I'm not sure if anyone has been watching but someone is buying 729.2489 BTC at 850. Which wouldn't be unusual if it wasn't following by an exact buy of 135 of 775 right after. This cycle has happened, with the exact same amounts for the past 30 minutes and I don't know what to make of it. It's just in a loop. The market won't move either way.

I know there is some kind of gaming going on, I just don't know what it is, yet. Any ideas?