A whisper from China tells me the story of a driver who thought he had a ghost in his taxi. This from the China Daily.
"Voices in his cab sent shivers down a driver's spine late last week when the chatter he heard did not come from the woman passenger in his vehicle."
"The eerie encounter on a road in Anshan, Liaoning Province, was explained only after the cabbie stopped the car, opened the trunk and found a drunk mumbling to himself. The man was so tanked he could not tell how he got into the vehicle even after police arrived. He was allowed to leave after sobering up." I think I would have been tempted to leave him in the boot for a day or two longer myself.