I will start with mine...

In my dream, I am sitting in a very dark room (well not exactly black but greyish)... which is very big.. it is also sloping.. I see very huge, spherical, very dark objects/balls(now these are black) rolling down that slope.. and I am sitting or lying on their way... They seem to get bigger and bigger and then one suddenly rolls over me.. The dark objects are so black that you can easily spot their outline in the already darkish room...

I always get awake frightened due to this... though it happens rarely.. I mean may be just 5-10 times that I remember..

What's yours..?