One of those rare cases when Hermione, bless her, lost her head :D
'Devil's Snare, Devil's Snare... What did Professor Sprout say? It likes the dark and the damp - '
'So light a fire!' Harry choked.
'Yes - of course - but there's no wood!' Hermione cried, wringing her hands.
'HAVE YOU GONE MAD?' Ron bellowed. 'ARE YOU A WITCH OR NOT?'
Harry Potter and the Philosopher's Stone
Chapter Sixteen 'Through the Trapdoor'