It follows many elements of design and composition. It's not that it is breaking rules at all.
There's several layers of repeated patterns, shapes and colors. Pattern breaks. There's what I call the "golden Y" of composition. The scene is chaotic and seemingly disorderly, which is perfect for the angle it was shot. It is very dynamic. The angle ADDS to this image rather than how it's used willy nilly in Facebook portraiture.
Even thought the image is a "Happy Accident", it demonstrates the basic principles of design and composition rather well.
Beginners can poo poo composition all they want. Whomp, there it is!!!