knee jerk (noun)

1. During the religious ceremony, the worshipper felt a knee jerk as a sign of divine intervention.

2. Why did the skeleton refuse to participate in the knee jerk test? It had no patella to tap!

3. In the anime series, the character's exaggerated knee jerk reflex became a comical trait.

4. The knee jerk reflex was first described by Sir Michael Foster in the late 19th century, marking an important milestone in the history of neurophysiology.