dark matter elbow

Laughing and laughing some more, Kakine took his six truly awakened wings and
slammed them into Accelerator.
He didn’t even care about Accelerator anymore. He just wanted to test this on
something nearby. That was all Kakine was thinking.
But then, a cracking noise let out.
A moment later, his body, hit with a massive force, was buried in the asphalt.
“Guh...?!”
He didn’t know what had happened.

Accelerator’s black wings hadn’t moved. He’d simply looked his way and waved a hand.
With just that, Kakine, who thought he was in an absolutely dominant position, lost,
crushed deep down into the ground.
He heard cricking and cracking.
It was his right hand, with the Tweezers equipped, being instantly cut off at the elbow.
(Gah...ah...!! Wh-what the...hell...?!)
Accelerator had picked up some kind of vector, changed its direction, concentrated it at
one point, and attacked him with it. He knew that, but even with all the world’s vectors,
he couldn’t have caused something like this. Right now, Kakine Teitoku was sure he
couldn’t lose in this world.
It didn’t make sense.
He couldn’t comprehend it.

- Toaru Majutsu no Index Volume 15, Chapter 5 Part 4