Talking about the uninvited ghosts in the car... I think it could go along the lines of, "you stop, you invite" mainly because if you were to take a hitchhiker, you stop. Which not only in itself is dangerous, but the motion is saying "yes, we'll take you". But that is just my thought on it :p
I remember when I was about 13, looking outside the window of the living room there was a nicely dressed business lady (I don't know who she was), and I do not recall her face, who went next door, knocking on the door (I didn't hear anything) but there was no one home. There was a vehicle parked in the driveway (spare vehicle), and when she left she walked behind it out of my sight. I didn't see her walk out from behind it. I watched for a good few minutes and there was no movement, so I went outside and there really wasn't anyone there. :/
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.