Horrifying moment packed party bus overturns during graduation celebration as students thrown onto pavement after crash

THIS is the horrifying moment a double-decker party bus topples over and crashes to the ground – throwing students overboard.The “chiva” truck – modified to have a second floor – was packed full of schoolgirls celebrating their graduation when it suddenly overturned.Harrowing footage shows the overloaded bus edging its way out of a junction in Ecuador before it slowly tips to the side.