Cuts a deep furrow into a stone floor

Luke saw Vader closing the distance between them. The Dark Lord would reach the lightsaber first.
He sprinted somehow, threw himself at the ground. He felt reborn as his fist closed around the saber
haft, then he rolled with renewed vigor to his right. Vader's blow was an instant late, cutting a deep
furrow in the stone floor where Luke had fallen

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