Last week, I had internal exam. My examiner, who works as a professor in the same university that I study in, was not happy with my performance and asked me to repeat the exam at a later stage. If I don't make it then, I would have to end my course. I was obviously upset with his decision. 2 days later, we came across each other face to face. I tried to avoid him, was a bit scared as well and stepped aside near the water cooler and acted as though I never saw him. I walked slowly with my head bent down as I was ashamed too for not having performed well. He, however, was very kind, courteous and opened the door for me and waited for me. After almost two minutes, I said 'water' ( with a gasp as I had held my breath while he was standing next to me with face in opposite direction). He left the door and walked away (probably a bit disturbed). Should I apologise for my behaviour? I was obviously not happy with what he had done, was ashamed and a bit scared and hence, did not want to talk to him. I however do feel guilty for the way I responded to his courteous behaviour. Can anyone let me know as what needs to done? Thanks.