I show emotion at work all the time. In Conroe when that rig burned down around me, or in the Gulf when one of the roughnecks lost all the fingers on his right hand, or the mine riot in South Africa, or the time SWAPO rebels shot at the rig in Namibia. Yea all kinds of damn emotion.
Perhaps it's easier to contain yourself in a nice climate controlled office?
This has nothing to do with environment, and everything to do with mental discipline. There is a world of difference between having emotion and making it apparent that your decisions are controlled and biased by your emotions. It does not matter whether I am sitting in an office or taking fire, I still expect people to stay rational and not become unglued. Such expectations are not unrealistic if people know it is expected of them and their leaders walk the walk, and I have had my trial by fire many times.
You either own your emotions or your emotions own you, and most things in business are not worth any emotional investment to begin with.
"F" ing A