Two add-ons that go hand-in-hand. The gun would shoot fast darts that do no damage, but 'take' a player down.
It takes three seconds before the dart takes effect. When hit, you would hear a "thwip" sound. Three seconds later your playertype is switched to "Unconscious player". It's basically an immobile playertype that appears to be laying on the ground. You stay like this for two minutes, and then you switch back to your previous playertype.
While out, other players can move your body by clicking on you. It acts like the throw mod sort of, only instead of throwing, you drop the player.