Kamijou inhaled deeply and sprang up from his position under the business desk. Along with his sudden rise, he swung the bulletproof glass to the side.

A large man with a nose piercing looked at him in shock.

An instant later, the man’s face disappeared from Kamijou’s field of vision. With a dull noise, the Skill-Out man’s body was knocked to the ground. The metal piercing must have ripped from his flesh, because it stayed oddly in the air just a bit longer.

[...]

It was the guy Kamijou had hit with the bulletproof glass back in the dome. He must have come to shortly afterwards. Because his nose piercing had been ripped out, he had some dark red blood on him. He hadn’t really had a chance, but Kamijou really should have tied him up after knocking him out.

Toaru Majutsu no Index SS Vol.1 ch.4 pt.8,10