She moves, at times, with the fluid grace particular to acrobats and dancers, and at others her motions are sudden and jerky, feral and darting. A sudden tilt of the head, an abrupt twist of the spine, and that's all the warning you get before she changes, switching from entertainer to killer, from elegant to lethal. My pet theory is that when she becomes the perfect assassin she gains a new awareness of time and kinetics, her movements so graceful and quick that the human mind can only process them in sudden still images, like the frames of a camera obscura. My words can barely suffice to convey the purity of her motion. I have to think of her in alchemical terms. She's quicksilver.