So if you're driving along the freeway and you pass an accident. Be careful, there might be a dead person there and if your windows are open that freshly dead corpse could be a little pissed off about his or her massacred guts on the the side of the road so they might just float along in your car and then you go home and put your wallet on the counter and the poltergeist crawls out and bam! There's your new friend to throw dishes at you.