“There are incremental advances that happen in all kinds of things. Every once in a while there’s just this iconic leap. Soloing El Cap is just this quantum leap. ”

— Peter Croft, a professional rock climber, on Alex Honnold’s free solo climb of Yosemite’s El Capitan in June 2017. From Elizabeth Chai Vasarhelyi and Jimmy Chin's Oscar-winning documentary Free Solo.