[To be fair, even Satou is puzzled for an explanation beyond 'magic.' Even a magical girl like herself is hesitant to use magic as a blanket explanation for mysteries. Even when magic is involved, it has rules and limitations. It isn't a random solution, but an additional tool to consider.]

Or perhaps what caused this also broke the tank... What else is there that might crash? A window?

[Would they feel a draft in that case? Satou glances towards the sky outside. It's too much of a coincidence for both the school and sky to go dark at once, isn't it?]

In any case, we should keep our eyes peeled for glass, ne?