Ibani presumes the flicker is due to the long running animosity between the Jedi and Sith.

She leads the way to a promising looking spot out back with lots of room. (Force-users can really MOVE.)

She activates both training lightsabers and grins wickedly at him. She exhales and her presence in the Force deepens. Ibani is strong, one of the strongest Sith in the Empire. She's surely as strong as any member of the Jedi Council in Obi-Wan's time, maybe stronger.

She crooks one finger at him in a 'come at me' gesture.