The dream takes place in outer space but no one used space ships of wore suits, everyone flew with either wings or telekinetic abilities. Yoshi was flying in space with some other creatures but he accidentally used too much "thrust" and shot upward and hit a ceiling and he thought to himself "why is there a ceiling in space???" He then gained too much "thrust" again and shot forward towards another galaxy (or a different part of the universe, I don't remember). He beat himself a little bit for making the same dumb mistake again and knew that the universe will be completely different when he goes back. He arrives back on Earth and everything was in fact, completely different.