An implosion grenade removes matter within a certain radius and pulls everything towards it creating an implosive effect, with highly damaging results.
Background
Implosion grenades were constructed by Erik Kluger at Kluger Electronics Limited in Washington, DC. Plans for creating the devices were found there by Arthur Nielsen after Erik's death at the hands of James MacPherson. Whether Mr. Kluger was the originator of the plans or just someone who made the grenades is unknown.
At one point, Artie had collected all known existing grenades and stored them in the warehouse. Erik Kluger was told and subsequently agreed never to create them again. Years later, rogue agent James MacPherson convinced the old artifact dealer to make them again and then killed him to silence him. Before his death, Erik Kluger created a known total of six more implosion grenades. Of those six, one was used at the Japanese Embassy, one was used at hangar CA-5A at Dulles International Airport, and four remain unaccounted for.
How it Works
The uses of an implosion grenade is to destroy objects, create distractions, and kill people. It works much like an explosive grenade, only in reverse.[1] Instead of exploding outward as with a standard fragment grenade, however, it implodes inward, making things appear to buckle, melt, and collapse in on themselves.
When first detonated, a bright visual light appears. Shortly thereafter, all physical objects within a certain radius of the implosion are "sucked up" closer to the center of the bomb, somewhat like a vacuum pulling objects towards it. This implosion lasts for less than 30 seconds. Once the implosion stops, all objects (including human beings) that were close enough to originally be drawn to the grenade remain in a hopelessly muddled and horribly twisted conglomeration.
Real World Connections
The concept of an implosion grenade in the real world can be seen in the detonation of "Fat Man", the nuclear weapon dropped on Nagasaki in 1945 during World War II. It was implosion that helped the nuclear weapon attain criticality by squeezing the plutonium at the bomb's core to increase its density and make it more efficient when it finally exploded outward.