Another idea for future use. Intercutting training scenes on Dagobah with the Arboria swamp chase from Flash Gordon.
https://www.youtube.com/watch?v=FICMraAZnPU
Flash could be Yoda's less successful pupil?
Fun fact. A lot of people building the sets for Empire went to work on Flash next, which might explain why Arboria looks a lot like Dagobah.