Finally something interesting, though Vader while he contemplated Myre's reaction to his attack. A cloud of dust was not very threatening in a combat situation, though it could become a definite annoyance. Especially if his respirator filters were clogged full of the stuff.
Thus, with a move of his hand, he caught the stone dust flying in the air and brought it back together to one ball. If one does it right, he remembered from his own training on Coruscant, one can create even art from mere dust.
Sadly, he wasn't a certain blue-skinned Grand Admiral, and so his sense of art was not more educated than mediocre.
"You are too loud," he tells her when the ball is finished.