One Piece Chapter 51, page 13: Roronoa Zoro Falls Into the Sea

Blood drips steadily onto the wooden deck with a soft "pota pota" sound. Mihawk asks, "Do you wish for me to pierce your heart thus? Why do you refuse to step back?" Zoro, sweating and bleeding, replies, "Beats me... not really sure myself... But I get the feeling... that if I were to take even one step back right now, I'd lose something very important to me... a promise or oath... or whatever it is would be irreversibly broken, and that I'd never be able to return back to where I'm standing right now."