I was searched for a topic called the "Decisive Moment" but only found a couple of brief entries, so started this one.
The only picture I can really be happy with at capturing that moment is this one. I saw the lady on the bike coming into the picture and just had enough time to frame the picture with the flagpole on the left and streetlight on the right, lucky that I was just the right distance away to get them in the picture, though they are on the very edge of the negative, and the lens was focussed at the right distance, and she was just in the right place when the shutter fired.
Leica 2f with 50mm f2.8 Elmar, Ilford Delta 100, scanned from a darkroom print.
Makes you appreciate HCB's skill, quick eye and quick reactions.