The Wall shuddered and began to shake. Without any other hint of warning each brick suddenly flew away from the body, drifting and spinning through the air. They flew independently around Clovis, spinning in place as they spun around him.

“Behold!” Clovis yelled. “The instrument of your death!

“Orbital Death Storm!”

He wanted to laugh. Really. He did. It was too funny for words. Orbital Death Storm, indeed. The intention behind the attack was clear as day. The bricks were spinning at an increasingly rapid rate, meaning that all Clovis had to do was take a walk around the room. Eventually his bricks would strike their target, and if Lelouch tried to take a shot then the whirling form of the bricks would surely prevent any incoming attack in a moment.

Except! That the attack depended on a single variable that Clovis would not , could not have possibly been be aware of. He was not confronting just anyone. His invisible assassin was a marksman, with the ability to see the attacks coming from each and every angle of the room. All he had to do was will Painted Black to take a location, and he did so immediately. In the process telling Lelouch precisely what was happening where and when, a perfect opportunity to tell him certain essential facts.

From these two observation points it was a trivial thing for Lelouch to perform the arithmetic in his own head. The rotation of each brick around its own centre of mass, and the other rotation around Clovis. All he had to do was watch and calculate, then wait for the perfect time to strike!

It would be impossible for Clovis to react in time, of course. In its previous humanoid form The Wall had used the sheer density of its mass to form as protection, alongside an estimation of the firing direction based on the sound. Yes. Based on its movement, that was how it had been able to block his shots. But now? The mass was no longer concentrated. It was spread out, all around Clovis leaving easily exploitable gaps.

-Lulu's Bizarre Rebellion Chapter 3