We had this healer who frequently talked to ghosts and helped them rest, usually, when he accomplished that (killing a murderer, delivering last words, saving a family) the DM made him stumble into treasure.
The DM sent us a ghost to expose the plot. Other guy wants to get it in on all this ectoplasmic loot.
The ghost (death by suicide) finish its speech and jumped out of a cliff.
DM warned him not to.
He does it anyway convinced of treasute.
His character became a pancake and we all was certain that he was drunk, which he wasn't.