J.k. Rowling said this quote

“ Harry dreamed he was back in the DA room. Cho was accusing him of luring her there under false pretences; she said he had promised her a hundred and fifty Chocolate Frog Cards if she showed up. Harry protested... Cho shouted, 'Cedric gave me loads of Chocolate Frog Cards, look!' And pulled out fistfuls of Cards from inside her robes and threw them into the air. Then she turned into Hermione, who said, 'You did promise her, you know, Harry... I think you'd better give her something else instead... how about your Firebolt?'And Harry was protesting that he could not give Cho his Firebolt, because Umbridge had it, and anyway the whole thing was ridiculous, he'd only come to the DA room to put up some Christmas baubles shaped like Dobby's head... ”