Production still from "Sarah Sze: Improvisation" (2012)

Sarah Sze installing "The Uncountables (Encyclopedia)" (2010) at the Museum of Modern and Contemporary Art, Nice, France, 2010
Production still from the Art21 "Exclusive" film, "Sarah Sze: Improvisation"

"You can spend a lot of time conceptualizing and thinking it over, and then it's usually in the actual making and the process where there is something spontaneous that, after all that planning, you had no idea was going to happen, and when that happens is when it's interesting."
—Sarah Sze

WATCH: Sarah Sze: Improvisation