Some of my Aussie friends, in town for the Vancouver Supernatural convention, caught a bit of the action from this shoot. They also grabbed a few photos with the Impala and handed their Ducknation ducks to Clif personally! They only saw Jared that night, Jensen was there but not in view.
Apparently in this scene, an actress is attacked and Sam rushes in to save the day.
Original source: Just Jared