That's a totally different issue!!! I have that all the time, but it's in my dash. It is just so loud that you think it sounds like a rock hitting the windshield. There is a link somewhere in here discussing this......oh, the other day I had my finger resting on a point in the dash while I was changing radio stations, and that happened. I could feel the popping in my finger!! So weird........
Wow, I can never pin point when it is going to happen. But every time it happens I freak out thinking my windsheild is going to crack. Thing is, today, it happened when I was stopped in traffic. Any idea where that link is? I couldnt find it.