Rudeness of some people

Huge construction next door to work - massive trucks everywhere and traffic being stopped - was walking to work from my car when one of the trucks came down the road and was obviously going to back into the construction site - I had plenty of time to get across the driveway but as I quickened my pace - I heard one of the traffic managers yell down the hill at me " Don't F...ing walk behind a truck when it is backing. I'm just waiting for him to need medical attention !