Around 45-50 Kilometers from Medina is a Wadi known as Wadi -e-Jinn. In this Wadi your car will Move without any Driver. If you enter the Wadi and you switch off your Engine the car will start going in Reverse. and when you enter the Wadi and while returning if you make your Gears Neutral, Do not apply any Accelarator or even if you Switch of your engine your car will move at a speed of 120 kmph. As if the Jinns are pushing your Car Outside their Area.
I have never been to this place to clarify what's the reason behind this, but here in London we have similar place in Epping Forest called Hangman's Hill and I've been there myself you do exactly the same as above and your car goes up the hill instead of going downhill.