Well this is what I thought too - windscreens can make up 33% of a structural rigidity of a cars shell. Course this is a stock road car, not a seam welded multi-point caged rally car, but when you see em landing after jumps and bouncing over the bumps, the screens have no flex - but fitting screens for a living, and I've been doing it some time now, I know these can't easily be changed in the time scales they have to change them!