There's a German documentary movie, called Richard Deacon - In Between from 2013.
In the referenced link to the movie, you find a trailer - among others on YouTube. They all have in common that they start with a quote of Richard Deacon about "what's creative...".
In the German translation this quote reads as
Was ist kreativ? Etwas, was dir durch den Kopf schießt, als interessant erkennen.
I would like to know how the original English quote reads. Unfortunately, it is blurred by the synchronized voice in the trailer and I can't recognize it or infer it on my own.