Its putting intense strain on the mechanical parts in the tranny... It's like chopping a tree... you don't slowly push the axe into the tree in order to chop it down, you just go at it with huge chops... If you go slowly (ie driving normal) then the trainny builds up tolerance agaisnt the pressure. A neutral drop is putting immense pressure all at once, destroying your tranny a lil more every time you do it. I suggest you immediatly stop, unless of course your trying to kill your tranny in order to do a 5sp swap, then by all means, do it, in fact post videos, let us have a shot at it... But i would recommend against it otherwise.