An implosion is simply the opposite of an explosion. In an explosion, matter and energy fly outward, but in an implosion, matter and energy collapse inward. ... So in short, implosions are caused by having a greater pressure on the outside of an object than on the inside.

Why does implosion happen?

Put simply, an implosion is the opposite of an explosion, matter and energy collapse inward and all implosions are caused by some form of pressure acting from the outside on an object. If that pressure is greater than the pressure within the object, without adequate support, the object will collapse.

What is a mental implosion?

noun Psychiatry. a form of behavior therapy involving intensive recollection and review of anxiety-producing situations or events in a patient's life in an attempt to develop more appropriate responses to similar situations in the future. Also called implosive therapy.