After the fall, he rubbed his bruised knee cap and winced.

The comedian's final punchline was a real knee-slapper that had the whole audience roaring.

The comedian's knee-slappers had the whole audience rolling in the aisles.

The comedian's knee slappers had the whole audience roaring with laughter.

She fell during the hike and bruised her knee-cap, which made walking painful for days.

After the fall, she checked her knee-caps for bruises.

During the exam, the doctor tested the patient's knee jerks to check spinal cord function.

His knee jerk dismissal of the proposal overlooked several important facts.

His knee jerk was to deny the claim without checking the facts.

The knee baby wobbled across the living room, clutching a stuffed bear.