Flexion of a limb or part beyond its normal range.
hyperextension
A volleyball player's wrist snaps forward after setting a ball.
The prefix would most likely be 'hyper-' and could include: hyperextension or hyperflexion.
Well if hyperextension is a type of extension then the opposite of extension is flexion and I'm not sure you can get hyperflexion, so it's probably just flexion.
It was the neck tar tar tar
Why does your neck crack?
Neck and Neck - 1920 was released on: USA: 26 January 1920
Neck and Neck - 1924 was released on: USA: 3 February 1924
Neck and Neck - 1931 was released on: USA: 4 November 1931
Neck and Neck - 1942 was released on: USA: 15 May 1942
neck