I've never seen this pattern before and haven't a clue what it might signify -
It's almost an "OMG - I bought that piece of Crap!" - "Sell it! Sell it!" - "No! No! - I really wanted it!" kind of a moment. Over and over again.
On the 5-minute charts it looks even funnier because there are gaps and pauses everywhere -
Come on folks - where else you going to get this kind of stuff - over at Ritholz's place - not hardly.