I used to have dreams about me being in a high place (on a pole, in a tree, on a building and such) and I had the paranoia of it falling over, it always did and woke me up.
The last time I had that dream I suddenly became lucid and the tree didn't fall over, but then the whole scenery changed and I lost Lucidity.
After that I never had one of those types of dreams.
Have any of you ever had this kind of experience?