well actually though wildly thought correct. negitives have been proven to have no benifit to muscle nerves. and in fact the only link they have is to injury..
so if you were doing negitives and went past a normal point then ya not only are u not use to the weight in that range, but you are also doing an unsave act anyways..
my advise, don't do negitives again, anybody that says they work its in their mind,