Today for the second time since my colleague has been working his notice he has been aggressive towards our manager. Our manager made a simple request for some information to be passed to our new hire and my colleague started sulking, so our manager took him aside to a different room, as soon as the door closed I could hear my colleague shouting at our manager. After a few minutes our manager walked out of the room and I could hear my colleague mocking him and laughing at him. It was so awkward and our new hire immediately started asking questions. The new hire asked whether my colleague has anger issues and because we will all be working together for some time to come I just said he didn't. but he does. My manager said he was fine when people asked him whether he was ok and joked that at least my colleague didn't hit him. My manager seems OK about it but I want to raise a formal complaint because i don't want to be in the office on my own with my colleague in case he turns on me next- Have you ever made a complaint? What is the process? Would he know i'd made the complaint?
A few years ago I worked in a small company that had a relatively flat structure aside from the Owner / Managing Director and Operations Manager. I was the only female working with about 15 men.
One afternoon, when the MD and OM were out, one of the guys - who I always found to be very 'off' (I suspected he was on drugs) - walked up to one of the quieter guys in the office and started verbally attacking him. At the time, there was a gentle hum of chatter, which stopped as the bully's voice rose. The quiet guy just sat there, looking down, not giving any sort of reaction, which fueled the bully to then start hitting him on the head.
I stood up and shouted at the bully to 'cut it out' at which point a couple of guys went over and intervened ... I was peeved that they seemed to wait for someone to make the first move! The bully eventually moved away, grabbed his bag and went off in a huff.
When the MD and OM returned, I went straight to the OM and reported what had happened, and he said to leave it with him. I told him I was one of many witnesses but was worried the bully might come after me for reporting it - the OM said not to worry about that. Well, as it turned out the bully was told that I was the one to report it, and he blamed me for him losing his job over it (apparently some things had been leading up to this event, so he had already been issued with warnings). For a while, he would wait outside work and follow me to my car asking why I did it; at lunchtime he'd follow me down the street ... I complained to the police but they were useless. I asked the OM to talk to him - he wouldn't have a bar of it ... it was just awful, but eventually the bully got bored and moved on.
My advice: Be very, very careful about reporting it and becoming involved. Your manager should be the one to report it, and you may be called in as a witness. It's human instinct (I feel) to want to remedy a situation, but it never ends well.