Have also had similar dreams. Mainly flying around under high trees looking for a way out.
Never seem to find it.
I also have dreams where I run fast and then start flying and once gained enough height gliding around towns and countryside.
Then comes a recurring nightmare... I crawl through a tunnel for miles and miles eventually seeing a small shaft of light, continue crawling and find its too small to get through and I'm stuck and it ends there.
Whats the gliding or tunnel all about ?