"WHAT THE HELL ARE YOU DOING YOU MOTHERFUKERS!"
It's pure gold! and later on she gives the excuse "He had a headache" (paraphrased, obviously, imagine it with bad spelling)
In later chapters the Divination teacher turns GOFIK and is referred to as "Professor Sodomize". That's my favourite bit...
Oh and the part where Dumbledore tells them to call him "Albert" for some reason...