helicopter blade grab

Unabara held up the obsidian knife knowing it was hopeless, but something happened
before he could do anything else.
He heard a clunk.
It was the sound of a white-haired Level 5 landing on one of the unmanned attack
helicopters. He forcibly grabbed the rotor with his hands as it rotated at high speed and
stopped its movements. The Six Wings had no way of dealing with this ridiculous action
and it fell to the ground and exploded.
“He” casually walked out of the flames.

- Toaru Majutsu no Index Volume 15, Chapter 3 Part 5