"Devil's Snare, Devil's Snare... What id 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?"

From Harry Potter and the Philosopher's Stone