hits accel alot, counter touch would kill- skill feats

“Gbah!?”
Kamijou’s fist plowed into Accelerator’s face. He moved his hand back and forth in
complex trajectories like someone swinging a knife around, but Accelerator never once
grazed his skin. Kamijou slipped past Accelerator’s poisonous snake-like arms and
attacked Accelerator’s face with his fist again and again.
“Dammit, what!? What’s with those weird movements!? You’re not an eel, so quit
wriggling around like that and stay put!”
Accelerator tried to grab the fist that was stabbing in at his face, but the smooth
serpentine movements of Kamijou’s hand prevented him from doing so.
“Hah. You’ve never lost.” Kamijou danced around with precise footing. “And that is why
you’re weak! You defeat all of your enemies in a single strike and you can easily reflect
any attack. There’s no way you would actually know how to fight!”
That summarized the gap between them.
Accelerator’s fights had no chance of loss on his part. They were just one-sided
slaughters. Because his ability was simply too powerful, he had never needed to learn
how to fight.
Accelerator’s stance was sloppy. He did not clench his fist. His fingers were spread out
like he was just asking to have them jammed and he gave no thought to his footing or his
center of gravity.

- Toaru Majutsu no Index Volume 3, Chapter 4 Part 6