Ron was terrified. He knew something has gone wrong after adding the Chinese Chomping Cabbage to his potion. The sizzling liquid has turned from light blue – the colour it was supposed to be at that stage of brewing – to an odd shade of…

"Green? Why is your potion green?" asked Harry in confusion.
"I don't know!" Whispered Ron in sheer terror.
He desperately tapped his cauldron with his broken wand. A loud 'boom' was heard, and a large shadow was looming over what looked like –

"Soup." Said Snape in his most unpleasant voice, smiling an equally unpleasant smile.

"Oh bugger."