i usually open all the windows as i myself can't withstand the heat, usually 2-3 minutes with full A/C on.
just to update what happened, the car was with the dealer for few days as i requested them to do fault analysis, i also shared some pictures to them showing the center glass was gone after the explosion and the remaining glass was opening upwards. their response was "caused by external force". sadly, this is too vague.
anyway, i have my car back after insurance covered the damaged....now driving - never to open again the sunroof cover!