hit by a small boulder

Kamijou Touma watched as that typhoon sliced the asphalt, the streetlights, and the
trees lining the street at set intervals to pieces as if with an industrial water jet cutter. A
fist-sized piece of asphalt flew through the air and struck Kamijou’s right shoulder. That
was enough to send him flying and almost knock him unconscious.
Holding his right shoulder, Kamijou looked around while moving only his eyes.

- Toaru Majutsu no Index Volume 1, Chapter 2 Part 4