Caught Off-Guard

I received a call Wednesday afternoon for someone wanting to talk to my husband.  This person was someone that the hubby knew, but I had never talked to in my life.  She started rattling off her phone number before I had a chance to grab a piece of paper and a pen or pencil.  I said, "you gave me that number so fast, can you give me it again?"  Her response back was, "didn't your husband "train" you to take messages?"  Wow, I was caught so off-guard by what she said that I didn't say anything.  First of all, she never once asked me who I was (I guess she assumed I was the wife).  Second, I felt that what she said in regards to my husband "training" me was kind of offensive.  If I knew her, maybe she could say something like that.  She doesn't know me from a hole in the wall. Lastly, after I told her that I would send my husband a message at work through e-mail to let him know that she called, she made a comment about my husband that was out of line too.  This isn't the first time that I've been caught off-guard by someone.  Lauren tells me I "shut down" when someone says something that I don't know how to respond to. I have never been one to think quickly on my feet that way.  I can usually think of something after the fact that I should have said, but by then it's too late!  When the hubby came home and I explained more in detail what this woman said, he at first didn't think it was a huge deal.  A little while later, he said how I might have been bothered, especially since I didn't know the woman.   I told him that this woman's boss should know the way she talks to people on the phone.  I was a receptionist and I answered the phones as part of my job.  I never would have talked to a client's family member like that.  When you answer the phone for a business, you are the one that gives the first impression of a company.  I never in a million years would have asked someone if their spouse had "trained" them on how to answer the phone.  I guess this person thought she was being funny, and maybe I was being a little overly sensitive, but it was still rude!  How do you handle things when you're caught off-guard? do you "shut down?" or do you have a witty retort at the ready??