does not have to control in straight lines

Accelerator gave that sound of slight admiration and the containers struck the ground
an instant later. A large amount of gravel flew up into the air and a cloud of sand
obstructed Kamijou’s vision. Suddenly, countless containers came rolling through that
cloud of dust as if to crush Kamijou. The containers rampaged around on unpredictable
paths like living beings similar to dice dancing around in a giant cup.

- Toaru Majutsu no Index Volume 3 Chapter 4 Part 6