Smaug certainly looked asleep, almost dead and dark, with...

Smaug certainly looked asleep, almost dead and dark, with scarcely a snore more than a whiff of unseen steam, when Bilbo peeped once more from the entrance. He was just about to step out onto the floor when he caught a sudden thin ray of red from under the drooping lid of Smaug's left eye. He was only pretending to sleep! He was watching the tunnel entrance!