Jake & Vienna The Nuclear Face-Off!

The first post breakup confrontation between "Bachelor" Jake Pavelka and ex-fiancee Vienna Girardi finally aired last night -- and it was explosive!


After hurling insults at each other for a half hour -- Vienna calling Jake a "fame whore," Jake saying she "disgusted" him --  the interview abruptly ended when a sobbing Vienna stormed out.

Check out the emotional showdown, question is ...