The dead human skin thing is an urban myth, according to Qi anyway.
Edit: http://www.qi.com/talk/viewtopic.php?t=6268&start=0&sid=da73fc3065e92924611e93502f9a3410
Edit: http://www.qi.com/talk/viewtopic.php?t=6268&start=0&sid=da73fc3065e92924611e93502f9a3410