A few years ago, in Paris, my commuting by train got perfectly synchronized with the alarm clock of an old gentleman who lived next to my workplace. Every day,

A few years ago, in Paris, my commuting by train got perfectly synchronized with the alarm clock of an old gentleman who lived next to my workplace. Every day, he opened his window exactly as I was passing in front of it. After a few weeks, we got to know each other in that strange way that people "know" each other but have never talked. After a few months, we were saying "bonjour" to each other, and sharing a smile. I would be honestly surprised if the man suddenly decided to shot me! Would that be a common thing to do in the U.S.A. ?