This is a scene I animated in my 2D animation class. The story behind this is that the two main characters are living in a communist country where they are enclosed within a wall. One day, the couple decided to use a hot air balloon to try and escape from their country. As they float in the air, they start to imagine the first time they met on a ballroom floor, which is the animated scene. Their hot air balloon was later shot by the soldiers, and the two characters were engulfed by the flames of their balloon.
This story is highly inspired by Armin's parents' story in AoT, and by the real-life family who used hot air balloon to try and escape East Germany via flying through the Berlin wall.