In reply to aln:
As a city commuting cyclist, looking out for pedestrians, particularly those crossing through parked cars on the left or stationary traffic to the right while I'm filtering, takes up probably half of my concentration at busy times, especially in the dark.
Many people often seem incapable of comprehending that there might be something going on outside their direct field of vision, or anticipating what might be about to happen, you need to do their thinking of them. It's generally fine when they cross at walking pace but sometimes someone decides to sprint across right into your path without warning.
I had a truly bizarre incident once along a quiet side road. I was proceeding at about 20mph. There was a clearly drunk couple dancing on the pavement, I clocked this and slowed a bit and moved to the centre line in case they danced out into the road without warning. The chap saw me coming and apparently for a laugh, ran into the road, threw himself onto the floor and started crawling into my path. I only had time to swerve around him and avoided him with about a foot or less between his face and my left pedal. It would have been a very nasty accident indeed, I wonder if he was aware how close he was to having his face rapidly rearranged.
Post edited at 13:31