I have a friend who trips out when she gets stoned every now and then. One time we were smoking and she got in her car to go home. So, I started doing stuff around the house and about 10 minutes later I heard a knock at the door. Ya know when you're really stoned, in your own little world, and a sudden noise freaks you out? Anyway, she comes back in the house, "Mary, I tried to pull out of the drive way, but the car started floating!" She was totally serious. It took her 10 minutes to get from the drive way back into the house, normally, a 20 second walk.