Evidence of Action

Produce one photogrpah in which it can be seen that something has happened:

This was taken at Waterloo.  The bicycle on the ground and the prescence of the amubulance tells us that there has been an accident.  After I took this I felt really bad, as the poor person who had come off the bike was inside the ambulance being treated...and there was me taking a photo....it felt gratuitous.  I realised though that this must happen to all photographers who are photographing events or scenes that do not have a happy story....