It sounds like it was one person doing this? Unless this person is in a pivotal or supervising role, I would not worry a lot - they may be on their way out already. I personally would have continued the interview as you chose to do and then reported the experience to the relevant hr/recruiter person. Remember, the one jerk in the room hopefully does not reflect upon the other professionals that continued the interview and were probably thankful the rudy left. Edit: also remember that you will likely encounter the others left in the room in other places and they will likely remember your professionalism in the face of this uncalled-for imposition, which should hopefully serve you well.