I remember something like this in the first episode of "Monk". He goes to a funeral, drop's his deceased wife's keychain in a coffin, and uses a string to retrieve it, causing the dead man's arm to lift and everyone shocked.
When I die, at my funeral I want an organist who plays "Pop Goes The Weasel" several times at the end of my Eulogy; To make people sit there and wonder if I'm gonna pop up from my coffin