Some people are more vulnerable to co-workers/boss mischief than others. They are more likely to take a co-worker's anger personally, (as if it were a true reflection on their worth and dignity as a person) and to overreact accordingly. Paradoxically, the more vulnerable you are, the more likely a co-worker or boss is to sense it and to make mischief with you in the first place. It follows, therefore, that one approach to reducing the amount of mischief you are experiencing on the job is to strengthen those areas of personal vulnerability that have been inviting it. This is how its done:
Very often, the last thing they expect us to do in these unpleasant situations is to agree with them! We are not agreeing that they are correct in their facts, but merely that they FEEL the way they feel. For example, you can say, "I'd feel the same way if I were you."
Validate their anger
"I don't blame you for being Angry." This validates him as a person in spite of his imperfections by treating him with respect.
Give them a choice
They can talk to you later when they have cooled off or write you an anger memo. Ask them "what remedy is it that you seek?" or words to that effect.
Agree with them
Agree that it would be nice if they get what they want from you. We didn't say we'd give it to them. When we validate their "preferences", we are validating them as a person in spite of their negative behavior towards us. What we are giving them is some relief from their painful, out of control anger.
When we choose to behave in this new way, we are standing our ground, but not in a hostile, threatening, morally superior way. We are equal members of the human race, and we are letting them know that they have lost their power to provoke us with their "anger mischief" and shenanigans.
It will help us to emotionally disengage from these provocations at work if we can shift our focus from our angry, mischief making co-workers/boss and focus attention on ourselves to make a change in the way we have historically handled these situations. We are so preoccupied with their nonsense, that we often forget that we are a person too. We are no more perfect than they are. We are not morally superior, but are only an imperfect human being as well. This very understanding serves as the basis for self and mutual respect which is the "key" to conflict resolution.