immediacy

Negative comments. We all get them. Not many of us enjoy them, but the majority of us can take the rough with the smooth. However, there is always that one statement (the straw that breaks the camel's back, if you will) that forces us to snap. To respond. To cause an issue. But what makes us do this? And why can't we take a step back, a deep breath, and realise that it's not that big a deal?