She was wearing a headscarf and was in her 20s - and must have either been deaf or wearing an mp3 player under her scarf. She just started stepping off the pavement in front of my bike as if I wasn't there - I rang my bell and said excuse me loudly but she still behaved as if I was completely invisible so i ended up having to shout at her - "what are you doing" etc and jam on my brakes in the drizzle. Disconcerting start to my day. I felt so shaken up I had to get off and walk for a while. Some pedestrians are incredibly stupid.