Thanks GED!

The spinnaker sheave block at the top of the mast broke and the halyard ripped through the carbon fiber. The rig was a prototype Advanced Wing Sail System (since replaced with a conventional Sparcraft Rig for other reasons, a future video will explain all that). This was not necessarily a rig problem though...don't want future Vision owners to be concerned about the safety of the rig. In this case. There was a little swiss cheese effect of a few things going on when it happened. Going to write it up in our blog soon.