The word "smile"

What are you laughing at? Three words:

Laugh,

Smiling,

Laugh,

Cheerful,

Laughter,

Laugh,

Smile,

Smile,

Laughing with ecstasy,

Laugh,

Smile,

Smile kindly,

Laughing confused,

Laugh it off,

Laughing at tigers,

Smile,

Laughing at tigers,

Smile,

Laughing at knives,

Dissolve with a smile,

Quack and laugh,

Smile, smile,

Laugh,

Laughing and sipping,

Laugh,

Laughing dumb,

Smile, smile,

Laughing at knives,

Laughing and coughing,

Laugh and laugh.