"arrow" intercept

Just then, he heard a gust of wind. The sound came from behind him. A male student on
the team opposing Tokiwadai had fired an earth spear straight at Mikoto. It seemed to
be accelerating because of his ability; it stabbed through the air with the speed of a
metal arrow. If that hit, it might even break a few ribs.
Mikoto was surprised at the abrupt attack and moved to intercept, flashes sparking from
her bangs, when...
“You stay out of this!!”
Before she could do anything, he stuck his right arm straight in front of him. His fist got
in between the earth spear and Mikoto, and when it hit, the entire spear shattered.
Dust kicked up, staining Kamijou’s cheeks, but he didn’t wipe them. He just kept staring
at Misaka Mikoto as though there was no time for him to do that.

- Toaru Majutsu no Index Volume 9, Chapter 3 Part 4