[Malevolent]

I sincerely hope that your first question was not a serious question. I hope it was just another failed attempt to be funny. Brain matter, once outside the body, is useful only for breeding maggots and other insects.

As for amputations, the worst I've ever seen was a few partially amputated fingers from a snowblower accident. If somebody ever had a fully amputated limb, it would be put in a biohazard bag and that bag would be put in ice.