I have an '04 Coupe and I've noticed exactly the same thing. It's nature to just open it up and let it go, I did it the first day I had it and I cringed when I heard it hit the firewall! Ever since then I'm just careful when I open it but like someone suggested above I was considering putting one of those little rubber bumpers up there, 3M makes some too that like he said goes on electronics but I haven't had an opportunity to pick them up yet.