Flexing glass

I really wish I had a decibel meter to find out how many dB's I hit at max. I must say, I think I have gone a bit deaf since I had it in my truck! And, it is incredible to see how much this truck flex's! The most concern I had is that I can actually see my windshield move, I would say, 1/4". Obviously it cant be that bad since it is'nt broken yet. But I wonder what level dB does it take to break glass?

Not only does my windshield flex, but all the other windows as well! And my window on my door is actually rattling badly it is audible enough over the bass. My seats, dash, and head liner with the lights covers all are falling apart! And the doors, mirrors, etc. also literally flex enough to see from a fair distance. But mazda trucks have thinner guage sheetmetal, so it's no surprise to see it flex, IMO.

I think its amazing how much glass can flex without breaking!