Afterwards, Mikoto had attacked Kamijou with everything she had, but Kamijou had
stopped it all with his right hand. Her attacks did not end at that Railgun. She could
twist together collected iron sand to create a whip-like sword of steel, send powerful
electromagnetic waves to mess with internal organs, and she could finish it all off by
sending real lightning down from the sky.

-Toaru Majutsu no Index Volume 1 Chapter 1 Part 5