glass knockout

A man holding a stun gun was collapsed unconscious at his feet. He had hidden until the
man got near and swung the bulletproof glass so the stainless steel frame hit the man on
the bridge of the nose. The man had fallen backwards like he had slipped on a banana
peel and ceased moving.
Kamijou had already taken out four Skill-Out members in that fashion.

- Toaru Majutsu no Index Volume SS1, Chapter 4 Part 8