Quanto ao porquê, especificamente ele não apenas removeu os sabres-de-luz de Grievous, parece requerer um nível de concentração e precisão que precisa de muito mais do que um segundo ou dois de foco. Tentar um movimento tão intrincado no meio de uma luta provavelmente resultaria em sua morte imediata, e isso supondo que Grievous não o derrote até a morte com as alças.
It was almost like fighting four different people at once. Obi-Wan’s lightsaber blurred as he blocked and parried, but he knew he couldn’t keep that up for long. Time for a different approach. He leaped, flipping high over Grievous to land behind him.
Grievous didn’t have to turn; he just rotated his mechanical body until he faced the other way. But even doing that took time and threw off his attack, just enough to let Obi-Wan’s lightsaber swirl past his guard. Two of his four arms dropped to the floor, still gripping their stolen lightsabers.
Before Grievous could adjust, and attack with his two remaining lightsabers, Obi-Wan reached for the Force. He lifted Grievous into the air, throwing him against one of the beams that supported the upper level. The impact shook the lightsabers out of his grasp. They landed on the floor of the control center, while Grievous slid past the edge of the floor and fell to the level below.