That's crazy!
How recently we're the windows tinted? I'm no expert, but I tinted my windows a couple weeks ago(took them out to do it) and when I reinstalled them, I had trouble with what appeared to be a rubber cushion that goes between the glass and the clamps that hold the glass. If one of the pieces of rubber was lost on yours, then the clamp tightened, thermal expansion in the metal clamp theoretically could have provided enough pressure to shatter the window...?
Strange...