I will discuss why one should flee for discussion's sake.
I found two intruders. Since the house was broken into - who is to say there are not more and I could be ambushed. Clearing houses is not fun.
If I ran at my amusing full speed - would they come after me? I am armed after all and could find concealment in many places.
Hunkering down behind my car would give me a better position.
As far as the emotional component of leaving my cave - don't care about that. I've thought through rational goals and ego isn't one of them in this situation.