Why does my following object stay a few studs behind me?

I'm trying to make Thor's axe and I'm making the summoning of the axe but while I'm running it stays a few studs behind me.

	--BP is BodyPosition
	while WSLoop == true do
		local state = Character.Humanoid:GetState()
		wait()
		if state == Enum.HumanoidStateType.RunningNoPhysics then
			BP.Position = Character.RightLowerArm.Position+Vector3.new(0,3,0)
		elseif state == Enum.HumanoidStateType.Running then
			BP.Position = Character.RightLowerArm.Position+Vector3.new(0,3,0)
		end
	end

change BP.MaxForce

Ex.

BP.MaxForce = Vector3.new(3000000,3000000,3000000)