I did the same thing on my 944S once. It was late in the evening and whap, big 3" depression. I was able to tape it and drive the car for a few months before I found a cheaper windshield.
Now, I always put some stout padding in the area when I do that job. It was a $300 lession for me.
Probably a lot of others but not many will come forward and admit this mistake!
Mike Holbrook
Meridian, Idaho
1992 535im, 17", Euro M5 Throwing Stars 8's & 9's, FK-451 235/45s & 255/40s, M5 Sway Bars 25/20, Conforti chip, Lowes Ram Air, glass sunroof