Well, when my cat is in "pounce mode" he gets all hunched down and creeps on his belly...pauses, and while he's paused (waiting for just the "right" moment, I suppose) his back end and tail do the quver shake - then *POUNCE*!
He doesn't seem to purr when he does that however. Otherwise, it sounds to me like he's stalking your gf's hair.
He doesn't seem to purr when he does that however. Otherwise, it sounds to me like he's stalking your gf's hair.