The window doesn't "shatter" it de-laminates. On of the panes has busted. Could be an outside, inside, or inner. Its scary to see and sounds like a fire cracker went off. I've had it happen on both the EMB and the CRJ. I guess it's my forte. I know guys that have had 3 or 4 flap fails in the CRJ. Its just another susceptible "ism" of the RJ.