shockwave spear

The sparks leaped from her bangs.
The lightning attack shot through the air, a thunderclap trailing behind.
“!?”
But it hadn’t been aimed at Kamijou. It struck a nearby cleaning robot that was currently
busy trying to get a piece of gum off the pavement.
The robot’s internal speaker exploded instantly. The sound and force of the resulting
shock wave ripped through the air and caused the glass doors of the department store
next to them to shudder.
Of course, this caused intense damage to him, since the ear-splitting noise had gone off
right next to him. The shock wave splashed into his ears and threw off his entire body’s
sense of balance and caused his feet to stagger. He stood there in place, head spinning. As
for the stupid cat in his arms, its cute “Minyaa” cries had evolved into actual ones that
sounded more like “Bgyaah!” and “Shaaaa!!”

- Toaru Majutsu no Index Volume 5, Chapter 4 Part 10