I would be glad to show or describe this counter to you--it is simple and effective.
I think I saw Massad Ayoob show how to do this on Personal Defense TV (Action Plan is my favorite part of the show). I took a one day Krav Maga women's self defense class a few months back and asked the instructor about it. He was going to show me at the end of the class (I was the only one with a CHL) but I was so tired I forgot by the end of the day. If you have direction and maybe a diagram that would be great.