The laugh they heard turned their flight into panic.

Karel's laugh turned into a cough; every word seemed to cost him.

He laughed at that, and the laugh turned into a cough.

As her laugh turned to a giggle, she wondered if he wasn't far from right.

His laugh turned into a grunt as a spasm of pain hit him.

He laughed at the thought, but the laugh turned to a cough that weakened him.

He laughed - a sharp, bitter laugh - then turned away.

Then she laughed, and this time the woman's laugh turned into the girl's giggle.

She gave that lusty laugh again, turned back to Eve.

Before I can say another word, her laugh turns into a cough.