It is a remote detonated mine that, when detonated, it creates an anti-gravity feild that slams the poor sods caught in it to the ground, keeping them there for a bit, allowing you to run or finish them off, as it does 50 damage, plus any fall damage incurred as a result, making it LETHAL around cliffs. Watch that you dont get caught in it. Best used on defence, zombies, or keeping paper still.