he'd then possibly forgotten these dreams or fantasies and then when the stimulus of feeling something on the back of his neck happened to him whilst asleep, suddenly the fantasy came back, all as a piece as it were, and it occurred to me that your dream about driving off viaducts  might be caused by being asleep, having one of these falling experiences, then relating it to previous thoughts you'd had, you know on the freeway or something, oh my god, how awful it would be if i, if i drove off that bend below, do you know what i mean?