Trust me, in the world I know Discord from.
A few hoofs to the face is getting off pretty easy, you should have seen this one time. When he turned Celestia to stone, she came back as weeping angel and broke his neck.
Don't worry though, he got better.
Nightmare though, she might be a bit scared from the hole turned into a cow.
I stand by my Nightmare Moo joke, even if no one else laughed.