I pulled into a Dunkin Donuts drive thru by Kidder Street. I was waiting in line when a man in a blue Ford Escape cut me off in line and almost hit my car. He began screaming and using very vulgar profanity at my sister and me. I did not incite anything at all and the man proceeded to put his car in park and proceed to get out of his car trying to fight me. I then rolled my windows up and locked my doors. He then returned to his car and proceeded to order a coffee in front of me and proceeded out of the drive thru.