Scattering

A friend of mine is trying to pawn off a forge technique on me that he calls scattering. It's an advanced floating technique I've never seen before, but had a hunch existed. He creates an immovable object(like a double box) and then deletes it, he presses x,a,x extraordinarily quickly and two boxes spawn, one in his hand and the other falls to the floor. He deletes the one in his hand and then starts a new round. A double box is then floating where the very first one was spawned. He can do this as many times as is necessary, before he starts a new round and all the objects will be floating when the second round is intiated. The thing is I cant do it. I just keep bringing up the item properties menu of the deleted box. He claims you can't have host connection to do it(I never do) but I simply think he's "bullshitting" me. Is what he says true? And if not could somebody let me in on the correct way to do so?