increases his own speed

“Your plan fails if I catch up to you!!”
Accelerator’s foot suddenly caused the gravel behind him to explode. He had altered the
vector for the motion of his foot. As if a rocket were firing from the bottom of his foot, he
shot 7 meters forward like a bullet in one step. Misaka Imouto tried to jump further back,
but Accelerator heartlessly flew forward many times faster than she could move.

- Toaru Majutsu no Index Volume 3, Chapter 4 Part 5