How to get the Rockwell Dermis? <Answered>

[The Fallen]

I have heard a lot of people on the net say they are not able to obtain the Rockwell dermis because there is no body so there is no way. Well I found a way.
As you have killed Rockwell he will do the death animation and thrash around in his little pool. If you stand at that time in front of him on that platform that goes to his chest, keep hitting him with a Taxidermy Tool. When his forehead comes down you will be able to hit him and obtain the Dermis.