[Ramius]

I had never heard of a 'V mask' so I did a search. It's a Guy Fawkes mask popular with the OWS crowd.

A witness earlier also described him as wearing a white hockey mask, "like Jason in Friday the 13th". FWIW.

[TigersEye]

It will be interesting to find out what kind of mask it really was. This could end up being a ‘big’ day for the left.