i used to be able to wake my self up purposely
i used to be able to do this, but i have no need to now because of lucid dreaming :D but i discovered different states that i could awake myself to.
It all started when i was in about a 20 feet deep pool, and i was in it, and does anyone know that black whale thing from Star Wars the Empire Strikes Back? its when Luke crashlands in the swamp on Degobah and you see a black whale thing swim by and swallow R2D2.
Well anyway there were those scary things in the pool too, and they were swimming after me, so i swam down to the bottom of the pool. instead of it being darker it was white-ish and then i realized, "what if i could wake myself up?" so i tried and then where i appeared didnt make sense.
I appeared to what was whiteness. total whiteness, the ground, air, sky, everything. and i later discovered that i could wake myself up "halfway" instead of "all the way" waking up. Then i had bad dreams and i didnt want to stay "in" them so i woke myself up completely. i could then wake my self up by will. All i had to do was to "force" the dream scenery away and , well , wake my self up. But if i had thought about visualizing myself in my room waking up, i would have reentered my nightmare, except it would start over at my house lol.