He manage to reflect teleportation.

 "It felt like having something you had grabbed with the tips of your fingers slipping away. When he reflected teleportation powers, a strange phenomenon occurred in the three dimensional world, but this had felt entirely different."

(Toaru Majutsu no Index Vol 20 Part 10)

Espers with teleportation moved around with their absolute coordinates in eleven dimensions in mind, not in three.

(Toaru vol 8 Chapter 3 part 1)

Shirai had the ability to teleport. In simple terms, it allowed her to ignore three-dimensional space and instantly warp anything at hand, including herself, to a distant location.

“…Don’t butt in on my business. Besides, you don’t fundamentally think about eleven dimensions the same way as the first three!”

(Toaru Vol 8 Prologue)