Breathing Funny

My friend fell asleep with book in lap and readers on the tip of his nose. His wife noticed his labored breathing and gently touched his arm as she checked on him. He turned to her, craning his neck and opening one eye and raising one eyebrow. She said quietly ” You were breathing funny.” He quickly replied “were you laughing??!” She laughed at his response for nearly fifteen minutes before being able to fall asleep herself.