Earlier quoted context omitted.
Staying calm and speaking during confrontations is a learnable skill. I humbly recommend reading the book Crucial Conversations, if you haven't read it, then practicing the techniques. I tell my "underlings" to breathe (with their diaphragm), to take their time, and to carry their voice. [1] http://www.amazon.com/Crucial-Conversations-Talking-Stakes-S...
Yeah, but another valuable skill is knowing that if you are treated this badly in an interview that even if you really want the job, sometimes it's best to walk away.
...and that's in the book! ;-)
edit: I think the key is that there's a dominant technique, regardless of whether you're getting trolled.