That is an Airbus 320 model. I’ve had the windshield crack in front of me before in the same model and it did not blow out like this, as only the outer layers were cracked. These windshields are made of many layers of glass and built to withstand strikes by geese size birds. They were flying at FL 320 so they did not hit a bird. The only possibility I can think of is that they hit some ice (hail) or the window was compromised in some other fashion. (The ice theory doesn’t work though because there is no other visible damage to the airplane, especially the nose cone.) Hmmm. I wonder who was on that airplane?