Contemporary artist Koki Tanaka sets up a booth at a Los Angeles flea market to sell palm fronds. "I tried to bring something very extreme into the flea-market context. I picked the palm fronds because they are the most useless things in California – they’re what we have to sweep away after a windy day. It was an experiment in registering people’s reaction to a fundamental question about the value of objects. And I was referencing two historical pieces: David Hammons’s Bliz-aard Ball Sale [1983], where he sold snowballs during winter in New York; and a Japanese manga called Munou no Hito [A Worthless Person, 1985], in which the protagonist sells stones by the riverside – stones being sold alongside stones. So both shared quite similar ideas." - Koki Tanaka

• Documentary