I have not seen many Soviet movies but https://www.imdb.com/title/tt0091341/?ref_=nv_sr_1 is amazing in many ways. Also I can't help but wonder how it could be made. I find the last decade of the Soviet union incredibly interesting, probably because I was a child at the time.
There's an autobiography book by Danelia (the director) where he explains how some of the things in that movie were filmed. I doubt it was translated, tho.
E.g. they used half of a plane hull with construction foam on top of it.
This is so cool: that exact movie is an another one in my short "amazing Soviet movies" list. I still remember the first time I saw it. I was a teenager, it was a summer. I was on my way out, but the movie started and I decided to see what it's about. I don't think I moved for the entire duration of it. It was so different and so captivating.
