reflection weakness 1

“Your reflection isn’t an absolute barrier.”
Kihara slowly walked forward.
Accelerator could not move.
“It only reverses the vector of any force heading into it. That makes it simple to beat the
shit out of you. I just have to pull back my fist the instant before hitting. You could say
the trick is stopping at the last second.”
He sounded like he was enjoying himself.
His smile was that of someone explaining the trick to a piece of stage magic they had
thought up.
“You end up reflecting the fist that is moving away from you. That means you actually
punch yourself. Do you get it now, masochist boy!? Or is it too complex for a little kid to
understand!?”
“!!”
Accelerator tried to get up, but Kihara’s foot flew his way before he could.
The sole of Kihara’s shoe stomped down on him from above again and again. As the foot
stomped on him in various places, his skin was torn and blood mixed in with the
rainwater.

- Toaru Majutsu no Index Volume 12, Chapter 5 Part 1