Accelerator only had to knock this guy aside and continue on to the engine room.

But just as he prepared to flip the switch on the side of his neck, his red eyes suddenly
rolled to the side while his head remained motionless.

There was a loud boom just as he turned his attention elsewhere.

This must have been a surprise for Hamazura Shiage as well.

The corridor wall was torn apart in a surprise attack.

The person who made such an exciting appearance had long silver hair, brown skin, and
bandages that were wrapped around her. Her bare foot had forced its way through the
vector reflection barrier and kicked the #1 through the air. Her leg ended up twisted at an
unnatural angle, but that did not keep her from laughing. The broken leg wriggled in a
way no human leg ever should as the bone and joint were repaired. It happened so easily
it was like seeing a balloon being inflated.

-Shinyaku Toaru Majutsu no Index Volume 22 Chapter 4 Part 7