She got a taste of my mean side

So the girlfriend got a taste of my mean side a couple of weeks ago.  We had a disagreement about something. I think it was work related.   She called herself getting mad and not talking to me.  Is that what you REALLY want to do?  Ok.  Let's play.  For the next few days I spoke to her only when absolutely necessary. Forget all the "morning babe. How was your night."  It was strictly business.  After a few days, we started talking as normal. She got tired of me basically ignoring her presence. So let this be a lesson. When needed, I am quite capable of being an asshole.