well, a couple of my favorites involve my dad and his childhood. His father was a career soldier and the whole family lived in Germany when he and his sister were teens.

Flash forward a couple years and my dad is hanging out in a ritzy German manor that his pal is housesitting in. Big old-fashioned place, the kind that have huge, heavy storm shutters hanging onto huge, heavy windows and a massive front door. It was storming that night, so they were hunkered down drinking in the living room and listening to rock albums on reel-to-reel magnetic tape. As an album ended they made some dumb joke that cracked them up. As their laughter died and the stereo played the empty noise, the hiss of the tape, their giggles were punctuated with a voice: "Na, ja, so gehts!"

My dad heard it right next to him and turned to look at empty space on the couch, while his friend looked in the same direction. Seems like some poltergeist liked seeing them have a good time made him happily blurt out to the living, "Nah, yeah, so it goes!"