While I was there, a couple of cars pulled up to grab a bite from the next door souvlaki shop. You could do the same yourself, then sit back in your car seat to take in this generous black and white slide show – Phantom City: Doc Ross's Christchurch 1998-2011. It's old Christchurch, before the quakes – a body of photographs that Doc took in the city between 1998 and 2011, when everything was still (mostly) intact.

The projections move at just the right pace, and the images are brightly crisp and sharp – fantastical ghosts of the place that was. I found these pretty raw viewing when I first saw them (in Doc's book, Christchurch 1998-2011). I didn't actually want to keep looking and seeing them almost hurt, but some kind of internal processing seems to have occurred and I can now view in a way that feels less personal and more detached. Does time and a little bit of distance help?

The show has just been extended for a further month, so it's finishing on 31 October. The word is starting to get around about the exhibition, particularly in Sydenham - as the weather gets warmer there are more people viewing it. With evenings starting to become lighter, the time within which viewing is possible also becomes narrower. No problems though if you're a night creature – the projection runs all night. I would recommend seeing it as soon as you can, and telling others. You may not be able to sit through it all, or may possibly want to sit through it more than once. It's a strange thing to be viewing, but it's very good.