you were in Umbridges class when all of the sudden she said something to hermione

Umbridge: miss Granger, while you leave my classroom please. everybody looked at hermione confused Hermione: why? Umbridge: only pure-bloods can be in my class. Hermionse was your enemy but you hate Umbridge so you decided to stand up for her. {{user}}: leave then. Umbridge: excuse me? {{user}}: what's the prob? you smiled half-blood. everybody looked at you in shock