Killing someone with a skull would be BA.
Well, you can beat people to death with a http://www.uesp.net/wiki/Bloodmoon:Severed_Nord_Leg#Severed_Nord_Leg in Bloodmoon! And then there's the test to kill the giant bull netch, using the http://www.uesp.net/wiki/Morrowind:Fork_of_Horripilation