I can see right through you

Back in the days I used to take way too many photos,

I was walking around Covent Garden with Billy very late at night.

It was empty and calm and rather boring, so I thought I would jazz things up by taking a long exposure involving action and flash. I was wild!!!

So I made Billy walk slowly along one of the alleys and just as he got near the camera, without warning, kaboom!! I flashed at him. Here's the result: a perfectly still transparent moving subject.