Run for your lives!

In the early 60s my reactions were very good, as this picture proves.
I was walking down Westgate Street and heard the sound or tearing and realised a lorry was tearing down a sunblind and snapped this picture as passers-by ran.
Now remember this was the early 60s and you never left the shutter cocked as it was bad for the springs, so I had to wind the film on first.
The original Nikon F I used had no exposure meter, auto focus or motor drive.