A Controlled Demolition Goes Wrong as High-Rise Begins Collapsing Unexpectedly Urban Construction Site — What was intended to be a routine demolition quickly turned alarming when a partially dismantled high-rise began shedding concrete and debris far earlier than planned. Footage from the construction site shows heavy machinery positioned around the base of the building when large sections of the structure suddenly start breaking loose from the upper floors. Dust plumes erupt as chunks of concre