A man sat at a metro station in Washington DC and started to play the violin; it was a cold December morning. He played six Bach pieces for about 45 minutes. During that time, since it was rush hour, it was calculated that a thousand people went through the station, most of them on their way to work.
Three minutes went by and a middle aged man noticed there was a musician playing. He slowed his pace and stopped for a few seconds and then hurried up to meet his schedule.