It's possible but you can't make them go on top of eachother without hovering.See, badspot's grid is 3 units up and 1 unit sideways to make a regual brick, he would have to make a whole nother brick grid
The point he's trying to get across is that you can't have something smaller than the grid go on top of itself without floating. the grid is bigger than the brick, so badspot would have to make a whole new grid for something like that.