So... wat happened?

[WillofDusk]

I just watched AT07 Documentary and there's part where they talk about Secret outro aerial dance.
They first did aerial rope dance but it seemed really hard. Then after Ayu saw the video tape of the rehearsal, she decided to drop it. When Peco discussed the situation with other dancers, they seemed really depressed and sad.
And the 2 female dancers cried when they heard the decision. Ayu later cried.




It looked pretty intense here and I really wonder what happened and the reason why Ayu chose to cancel the aerial dance, why the dancers took it badly and everything else.