Thankfully for him, Apollo.

Amelia knows all too well that the Ministry had no weight over Hogwarts, and even more specifically the houses within it. That is something she'll highlight upon immediately.

So no ten points lost. She has the final say since it is her House.

However, detention for being reckless....is more than possible. Quite likely even. Actually, after your classes are done for the first day. We'll see what happens.