"What did you say?" she asks pointing at you, "Bovinus Transformus?"
Your stomach starts to churn.
"NO!" you shout as your gut bursts out.
You rush over to your desk and rummage around for the antidote spell. There is one isn't there?
"Alright, what did you -MOOOOOOOOOOOO!" says your girlfriend as an udder swells on her chest and begins to migrate slowly down her torso.
"We're turning into cows!" you shout, and then you add, "I didn't think the spell would work. It was supposed to be a jo-oh-oh- MOOOOO!"
Your shirt buttons fly across the room as your chest is replaced by an udder.