My Sunroof BLEW OFF !!

Do not leave your car with your friends in Las Vegas while you fly home to visit family! LOL somehow this happened while my friends drove my Jeep back to Los Angeles. How does this even happen?? The sunroof literally flew out of the entire roof of the car and shattered behind them on the highway. Has this ever happen to anyone else? What will insurance say? Still can’t believe this at all.