Re: Controlled implosion
Controlled demolitions use explosives to cut through the center supports of a structure so that the structure collapses inward.
Right. It's gravitationally powered collapse in a (hopefully) predictable manner. Nothing is imploding. Imploding means that there's large pressure differential with high pressure outside and low pressure inside.
OceanGate's Titan submersible imploded.
Buildings being demolished just collapse when you cut their structural supports.