if he has a long, he can control the entire thing

Accelerator’s power allowed him to change the vectors of anything he touched. Motion,
heat, electricity. Whatever kind of power it was, he could freely control it as long as it
had a vector.
“Kukaki.”
That meant that, if he could grasp the vector of the wind flowing through the
atmosphere, he could bring the motion of the giant wind flowing throughout the entire
world into his hands!
“Kukakikekokakakikukekikikokakakikukokokukekekekokikukakukekekokakukekikakok
ekikikukukukikikakikukokukukekukakikukokekukekukikukikokikakaka!!”
Accelerator lifted his hands above his head like he was trying to grab the invisible moon.
With a roar, the flow of the wind started to swirl around.

- Toaru Majutsu no Index Volume 3, Chapter 4 Part 6