Diana makes waves

Diana knew she wouldn’t reach the gunman in time to stop him from firing.  She looked down at the tiles fitted together on the floor.  She needed reinforcements.  Maybe they could be her army.  She took a running leap toward the soldier and came down hard, foot and fist connecting with the ground at the same time.  The tiles lifted in a rippling wave, and the man with the pulse gun screamed as the floor heaved beneath his feet.  He toppled.
Diana sprang toward him, seized the weapon from his arms, and snapped it in two.  He skittered backward in a crouch, his eyes wide and terrified.