Implosion is by far the most dramatic way to demolish a building. It involves using explosives to knock out a building's primary vertical supports, causing the building to collapse onto itself from the inside out. The placement of the explosive charges and the sequence of detonation are critical to a successful and safe demolition. Implosion is often used to demolish large structures in urban areas. From:https://www.thebalancesmb.com/ways-to-demolish-buildings