Throws a Force-enhanced lightsaber at Luke, disarming him even through Luke's parry

Swinging his saber until it was no more than a blue blur in the dank air of the temple, he leaped
straight up into the air. It was more than a jump, less than levitation. Out of the blue circle of energy
he flung the saber.

Instinctively—he had no time to think—Luke parried. The Force inherent in the thrown saber knocked
Luke's out of his hand. Both weapons flew off to the right and lay, still gleaming, still activated, on the
ground, near a dark circular opening that gaped black in the floor.

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