“The wings of the seraph shines brightly and the bright light is a pure white color that reveals all sins…” One of the students near the front began to mutter ambiguities.

“The pure white color is proof of purity, the mark is the result of one’s actions…” An additional voice overlapped with the first.

“The result is the future, the future is time is uniform…” A second, third, fourth, fifth sixth seventh eighth ninth tenth eleventh twelfth thirteen fourteen fifteen sixteen seventeen eighteen nineteen…

“Uniformity is all, all is created by the past, the past is the cause, cause is one. One is sin, sin are humans. Humans fear, fear is guilt. Guilt resides within oneself. If in oneself there is something one despises, the wings of the seraph shall reveal your sins and purge it from within!”

An 80-person chorus, or perhaps a pugilistic verbal maelstrom created by the thousands within the building, echoed unceasingly.

Hovering in front of each student’s forehead was a ping-pong ball sized blue-white glow. Perhaps the orbs were beginning to gather as they floated and even stuck to the floor below Kamijou, coming from the lower floor.

And then, like explosives or the sizzling of a strong acid, the orbs emitted smoke. Touching even one would have caused burns.
[...]
The two of them ran down the long corridor and finally arrived near the staircase. At the same moment, they noticed a large number of blue-white orbs deluging in. They were pincered.

Toaru Majutsu no Index vol.2 ch.2 pt.5