"'onestleh," Sam replied, "I've 'ad betteh. But I 'ad a lot worse too." She lent forward on her elbows so she could see what he was adding into the cauldron more closely as she waited for the potion to take effect. Had the professor said how long it'd take for symptoms to occur?

It was weird, just hanging out waiting to be fake!poisoned. Until...

"'ey, Oliver, 'as it gotten foggeh in 'ere?" It might well have done, with the water being added into the cauldrons. Or perhaps her vision was going a bit fuzzy and blurry. She squinted as she tried to work out which.