‘Not knowing anything about the figure is an important part of the photo’: Gerry McCulloch’s best phone picture

The photographer noticed this humble story' playing out silently on a visit to the Tate Modern in London

In the Turbine Hall at Tate Modern in London, Gerry McCulloch and his wife, Kaori, werebuying tickets for a Yayoi Kusama exhibition. I happened to turn around and catch aglimpse of this unidentifiable figure," he says. Among thousands of visitors from around the globe, it tickled me that this humble story was playing out silently in an unnoticed corner."

As well as being a photographer, McCulloch is a visual storytelling coach, and in his own creative practice his mantra is identify, clarify, simplify, amplify". This image, he says, demonstrates each of these components. The opaque quality of the window helps exclude extraneous elements and draws the viewer in to what he calls the mystery of the moment".