jumps down a floor

Inside, Stiyl was astonished. Nothing all that amazing had happened. Just before the
explosion, in the instant Stiyl had sliced through the giant flame god with the two flame
swords, Kamijou had let go with his right hand and jumped over the railing.
As he fell, Kamijou had grabbed the railing one floor below and pulled himself up onto
the passageway. He had no lifeline and had pulled it off with pure guts and courage, so it
had actually been quite reckless.

- Toaru Majutsu no Index Volume 1, Chapter 1 Part 7