human bomb

He manipulated the vectors of his leg strength, altered his aim from Kihara to the
Hound Dogs, and charged right up to one of them. Ignoring his shotgun, he stretched
out his hand. The man’s uniform had a knife, a handgun, and other weapons attached.
Near the shoulder, he had four grenades.
Accelerator was aiming for them.
He used his index finger to little finger to pull all four pins.

With no pause whatsoever, Accelerator kicked the man in the gut, sending him flying
back and knocking over the other Hound Dog members as if they were bowling pins.
The man on the top frantically reached for the grenades still attached to his uniform.
And then the human bomb detonated.
These were fragmentation grenades, so they sent flesh and blood flying in every
direction.

- Toaru Majutsu no Index Volume 13, Chapter 9 Part 7