I used to work for an aerospace engineering company that repaired inertial navigation units (INUs) for F5s and other jets for world militaries and I was in charge of sales, i.e. I made quotes and maintained communication with our customers. I received commission of $1,000 for every INU we repaired.

We were in the middle of a particularly large order from Sikorsky for 7 units and 19 AOA indicators for which I was to receive around $10,000 in commission, the PO came to just under $1 million. So my boss tells me that we're going to have to move it down to $700/unit and I say OK, even though it kind of pisses me off. Then the next day he says he's going to lower it even more so I simply say "Well we originally agreed on $1000/unit, then you changed it to $700/unit and now you're lowering it again?" Not even with a tone. So later a junior employee comes in my office and tells me that I'm discharged from the company. I tried to speak with him but he childishly ignored me.
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I'm not looking to get my job back because I was an "at will" employee. But I just think he overreacted.. He definitely is a loose cannon.. Just a few days before he was throwing chairs around his office while I was in there.