It threw its head back, cackling with insane, gleeful laughter.

Those huge, mad words were followed by an equally insane laughter.

The prisoners could hear his insane laughter as he fled down the corridor.

The film then cuts straight to black and his insane laughter is heard.

The transformation still leaves him slightly mad, however, evidenced by his insane laughter and actions.

Or was it just that insane laughter from the cage?

"June the first -" came his voice, followed by a peal of insane laughter.

The majority of his sentences end in insane laughter.

His insane laughter is heard, as the credits continue to roll.

The wind carried a disturbing sound to his ears - the cackle of insane laughter.