It sounds like something out of Inception, but it’s true. Falling backwards while in a dream is a popular technique for awakening from an unpleasant dream, or changing the scenery of your unpleasant dream.
There’s a whole guide to doing it correctly. It takes some time to learn to use well, and requires a few things to know beforehand. Falling backwards in a dream can sometimes cause a “false awakening,” where you think you’re awake but still dreaming.
If you’re really committed to making the “falling backwards” technique work, you have to remember to do a reality check after falling backwards. It’s likely you’ll still be asleep, though.
It’s important to make sure you’re thinking of a new “dreamscape” to fall into when you’re falling backwards, or else nothing will happen. Sometimes, a nightmare can be so bad that it wakes you up.
But falling backwards from one nightmare into a better dream can ensure you won’t wake up. Closing your eyes is also recommended when falling backwards in a dream because it can help concentration.
It’s also recommended that you move intentionally when falling so that you can prepare yourself. The whole guide is very extensive, and if you’re interested, you can read moreat the source