Driving down the freeway, the sunroof explodes. I literally thought a bomb had gone off - huge noise, flash of light, then, after a second or so, glass rained down. Lucky I was able to maintain driving until pulling over. Also lucky that most of the glass landed on me and not my daughter in the back seat.

BMW says it's not covered under warranty because it was caused by an impact, but there was no impact. No overpass nearby, nothing flying towards me from cars in front of me. No evidence that there was an impact.