Railgun Concrete Walls

And then something flew by at high speed piercing through the walls on the left and the right that had not yet been destroyed.

It ripped through the air at three times the speed of sound.

An extremely tiny projectile pierced through the wall at a point almost at the ceiling.
That smashed the entire wall spreading pieces of concrete everywhere.

A glowing orange line remained burned in the retinas of everyone there.

Shortly afterwards, the rioters crowded inside that small space were blown away as if it were an afterthought. Some were hit by the shockwave and some were hit by the whirling concrete fragments. As if that raging violence had been overwritten by an even more sublime violence, the situation was completely turned around in an instant.

A low rumbling noise could be heard.

With the four walls destroyed, the now unsupported ceiling began to collapse.

The rioters that could still move frantically ran from the room, but the tragedy they were expecting did not occur.

Ignoring gravity, the concrete ceiling floated in midair.

It was as if magnetism were being manipulated.

“...Chehh. You stole the best part,” Lessar muttered while still collapsed on the ground. Enirya looked over in the direction Lessar was looking and discovered who the “ruler” was.

“Misaka... Mikoto...”

Toaru Kagaku no Railgun SS2, Chapter 6, Part 5