I got more of a serious or intimidating vibe from that rather than angry or irritated. But I can see it now that you mention it.

You're right, more possible emotions to see.
Now I see as well: One step further and you're history

Really good expression, that gives so many possible interpretations.

Agreed, it's a good expression. To add to another possible interpretation, I see this expression as exasperation/annoyance. Because the arms are folded, I think.