Suddenly, he was surrounded by darkness in every direction.
Kamijou’s thoughts fell into chaos.
Nothingness surrounded him.
Immediately afterwards, he realized what had happened.
(This time, it wasn’t the air. Was I sealed inside the sphere!?)
Next, either the gravity would increase and crush him from all sides or he would be squeezed out of the small opening for energy and turned into human pasta.

Toaru Majutsu no Index New Testament vol.4 ch.n pt.2