I'm sure there is some statistical analysis that can be done to predict whether a leaf will fall from its petiole, 20 metres to the ground, to land and become part of the photographer's image or be swiftly carried along by the stream which is fast-flowing and narrow, wide and slow in places, to flow towards the sea.
Or indeed to be thrown on to a rock and deposited there as higher water recedes.
The green moss here vibrant from recent wet weather, the same precipitation that feeds the stream and helps to bring those dried leaves to the ground.
And it's a scenic sight, reds and greens saturating this small corner of the Irish countryside.
Photography in Ireland isn't just a summer interest, the country has many beautiful scenes to capture throughout the year.
Having checked the weather radar it looked like better weather was to be found away from Dublin.
I found the sunshine after a little rain and the morning got brighter and warmer. I stopped at a woodland stream to photograph some woodland colour and character.
Enjoy the video from the day's journey through the scenic Irish countryside.
As the small stream makes its way from the open mountain, its source towards its destination - in this case to meet with a larger watercourse - a river, it flows through a small woodland of distinctive beauty.
At one point a sharp cut or cleft in the rock, allows the stream's fresh water to fall freely for a few feet or less than a metre as seen here.
Autumn, is there a more colourful time of year?
Here on a photography workshop we set out to find colourful woodlands and streams, here we found the perfect combination of both.
We made the coast our main focus but how could we have resisted the colourful charms of this woodland scene? Would you pass on this one?