Oh man I know exactly what you are going through I've done that so many times but I havem't had one of those experiences in a while. But yeah I used to sleep and I would like be in a car or somerthign and I guess the car just does a huge turna nd I start haveing that fuzzy feeligns all over your body and I have the biggest feeling of fear and it sucks bad but I wake up finally and then I try to go back to sleep and it just happens again so I usually just stay awake for a few minutes and switch positions and I sleep fine the rest of the night.