One time we came across a severed elven hand in a lich's dungeon. It appeared to have either been preserved or only recently severed. I don't know why anymore, but we decided to hang onto it - so my archivist put it in her heward's handy haversack. Not long aftewards, something happened and I heard a scrabbling noise in my pack! I screamed "get it of get it off!" and got rid of that pack as fast as gnomishly possible! Anyway, the hand crawled out, and the flesh sorta melted off of it as we watched and then the skeletal hand pointed at a doorway.
It was about the creepiest thing we've encounted in the game and the GM did an exceptional job describing it.
I'm now carrying the disintigrated ashes of a force dragon in one of my haversack compartments, and I am terrified that it will do something horrible some day.
/ali