Driving down the freeway, going about 65 mph, with the sunroof open, we heard a loud bang/explosion. We couldn't figure out where it came from until I decided to close the sunroof and glass started falling. We decided to leave the window open. We got it into the dealership and were told that they could not be covered under warranty and that we will need contact our insurance company. Thankfully, we read a complaint on this website that described exactly what happened to us and it said that after he escalated to corporate Toyota covered it. We're hoping for the same outcome.

Was driving on the highway at highway speed ~70mph, with no one in front for 100 yards, nothing above, and no one behind me. High winds and a storm front in the area meant that there was a ton of microclimates and pressure variables. Pretty sure that a very minor manufacturing defect in my sunroof glass combined with either subtle warping from the high winds and changing pressures caused the sunroof to explode outward. This appears to be something that happens.

Toyota Service Center wanted me to say it was a debris impact and report it to my insurance, but there is simply no way it was a debris impact. I've been in cars where both side windows and windshields have been shattered by being struck by something. The sound was completely different this time. It was a POP-bang not a CRASH-bang. The dealer service has passed it up to Toyota Corporate to determine whether they will cover it. They had better.

Update from May 23, 2017: Toyota stepped up and covered the cost of full replacement of the sunroof (after I wrote to the General Manager at the dealership and he forwarded my complaint to corporate).