A Vos Loss
One of the reasons for this sudden drop is a recent Razz clash with David Levi, the elder player check-calling Vos down before forcing the Aussie/South African to muck his inferior hand on the end.
On a side note, Vos is looking quite serious today. He's normally very vocal and as energetic as a kangaroo on a hotplate, but he's all business at the moment, perhaps determined to recover that nice meaty stack he once had.