I did an experament on this I went to bed not high or drunk or any thing (it took a month but I finally had onen of those dying dreams) I was'nt high and I woke up right around the part where I fall off of the cliff and it felt like I actrally fell and hit the ground but I woke up just then. then I did it high and I fell off of a cliff the same thing happened but I did'nt wake up weird? rock walls and rock climbing. never again