Sakura purposefully tripping over Sumire's kimono in the first chapter, which leads to a small fight.
Kohran's introduction in chapter 2. After her bike explodes, she is covered in smoke and dust, coughing all the way.
During a performance of Rose of Versailles, Sakura trips over her footing and tries to grab the curtain. Unfortunately for her, she ends up destroying the stage in the process.
Kohran uses a steam-powered lie detector to interrogate Ogami in chapter 4. If Ogami lies, it promptly explodes and he ends up covered in dust not unlike Kohran.