You could wrap it up in a nutshell. "I have a problem with FB... you're on it. Now give me my stuff so I can leave."
But, since there's an excellent chance she won't be there (aka, hiding around a corner, waiting for you to leave) I think you just dodged a bullet.
Good luck. If I was closer I would help. I don't know kickboxing, but I do know Kenpo Karate, just saying... Me - BS, 39 (I'm not old...I'm vintage)
Two Wonderful children - DS10, DD7
Him - (Doesn't matter)
D-Day June 12th 2008, D-Day #2 Sept 28th
D-Day #3 Feb 15th & 16th 2010, D-Day #4 Nov 29th 2010