Director Steven Soderbergh said on Wednesday he so enjoyed making his psychological thriller "Unsane" on an iPhone, he would find it hard to go back to conventional filmmaking.
"Unsane," which premieres at the Berlin film festival, was shot over just two weeks — way shorter than the months a movie usually takes.
It tells the story of Sawyer Valentini, who moves to a new city to escape her stalker David but finds herself admitted to a mental health institution where he works.
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