The abnormally high rate of cockpit windsheild/window failures on the CRJ are the result of a flaw in the fabrication process. PPG (the manufacturer) has identified the problem and has changed their procedures accordingly. I don't know of any windows actually blowing out entirely while in flight, which is amazing considering how the whole pane usually spiderwebs. Very scary.
Thou shalt mind thine altitude,lest the ground reach up and smite thee.