Throws a sphere of Kinetite at Luke, and then endures it being deflected back towards him

As Vader drifted slowly back to the floor he grabbed his right wrist with his left hand, made a fist, and
seemed to convulse like a man retching. A ball of pure white energy the size of his fist materialized in
front of Vader's hands and moved down toward the wide-eyed Luke.

Something made Luke realize he could never reach his saber before the white glove touched him. He
threw up both hands and looked away. So he didn't see what happened.
His hands seemed to blur. The white glove struck them, bounced back, and contacted Vader gently as
the latter touched the ground. There was a soft crack as of an explosion far in the distance. Vader was
knocked head over heels and the glove vanished.

But when the white energy ball had touched Luke's hands, the power inherent in the kinetite, or
restrained energy globe, had thrown him to the ground. Had he resisted it unsuccessfully it would have
thrown him across the chamber and through the temple wall.

Now he lay on his belly while Vader rolled slowly onto his side, shaking his head in disbelief. His
eyes refocused, to see a shaken but otherwise unharmed Luke crawling slowly toward his lightsaber.

"Not... possible!" Vader muttered, starting to crawl toward his own weapon. The left side of his body
armor was dented inward as if by a giant's fist, where the kinetite had struck. "Such power... in a child.
Not possible!"

Splinter of the Mind's Eye, Chapter XII, 122