This is one of the episode where Finn and Jake are minor characters, and our cute little BMO is the main character. It could be BMO imagining things or real about the bubble, but i assume it's real. The last few moment were amazing because when Jake pops the bubble, this shows that someone important to you may not be important to others. And finally the bubble realize it is air, this is a good twist as it has good ending. However, there is room for improvement such as BMO's adventure because meeting the giant baby with that color came off as creepy.
Pardon for my poor English.
Pardon for my poor English.