I am a manager in a high stress work environment. I have to work closely with other managers routinely and we do not always see eye to eye. Today during a heated discussion with another male manager, he abruptly slammed his hands down on my desk while I was talking and stormed off. I tried to call him back and he just shook his head and continued walking away. I was greatly bothered by this aggressive gesture and felt this was not only unprofessional, but also very intimidating coming from a male. I met with the HR manager and voiced my concern and discomfort about this. I was told I did the right thing. I've been working in a corporate environment for years and have never encountered this. I am very upset and would like to know if I am over-reacting or if this was out of line?? What's really disappointing is that this co-worker and I have had a good working relationship until very recently. He has become extremely defensive lately for no apparent reason?