The best dipstick for gauging a comic's depth is involuntary laughter.

One day when he was playing bear she pushed him so roughly that he fell against a piece of furniture, and when she saw the lump on his forehead she burst into involuntary laughter.

Ludnyola barked with involuntary laughter, then swallowed it hard.

The classic presentation is gelastic or laughing epilepsy, a disorder characterized by spells of involuntary laughter with interval irritability and depressed mood.

'You argue well,' agreed Hotspur, watching him keenly, and with a sudden remote spark in his eyes that looked like involuntary laughter.

Jonathan, who had come up on us unnoticed, barked with involuntary laughter.

There was much involuntary laughter that morning.

Everyone looked at Macro in surprise, and the look of utter innocence on his face drew involuntary laughter from several of the councilmembers.

Behaviorial changes include involuntary laughter and a sudden feeling of happiness.