Gymnastic formation is one of the shows performed in yearly school sports event which is common in Japan.
But, it's been an issue since one student fell from gymnastic formation.
In Japan, to show leadership or dignity of teachers, some gymnastic formations become higher and higher. As a result, we can see gymnastic formation which consists of 10 layers. It's so dangerous that some people want to abandon gymnastic formations in the school sports events.
But, because of stubborn teachers and parents, we can't.
If we compare benefits of gymnastic formation and defects of that, we take it granted for canceling it.