I had a spontaneous break once with a Velux roof window in a house. I suppose the same could happen in an RV although I've never heard of it before. Perhaps you should check with local law enforcement to determine if any other windows have been broken on or near the interstate. A rock or worse, a bullet, could have been the cause.
--2005 F350 Superduty Crewcab, 6.0, 4wd, short bed, 3.73 gears;
--2016 Montana 3711FL, 40'
--2014 Wildcat 327CK, 38' SOLD