Have you tried Jumping when in doubt?

usually if you think to jump and float you'll at least have some amazing air time.

I don't like to do this as a first test, as so many times I realize I'm dreaming, don't bother to RC at all
jump and half fail, destabilize, fail to escape the void and wake, Gone in 30 seconds style.

But if you already know your dreaming floating in the air is pretty confirmatory.