teleport needles into clothes

A sound like a sewing machine split through the air.
When the woman looked back down, there were two metal arrows piercing through the
loose parts of her dress sleeve and skirt fabric, pinning her to the asphalt.
“...not to move. Do you not understand Japanese?” Shirai Kuroko demanded quietly.
This, too, was an attack that used teleportation. She had instantly moved the arrows
hidden in her skirt into specific points. It was both as strong and fast as a machine gun. It
couldn’t be blocked with anything, since the arrows instantaneously warped from one
place to another. There also wasn’t any chance of collateral damage. It was a truly
unbelievable attack.

- Toaru Majutsu no Index Volume 6, Between The Lines 1