most of the fish I try to measure and that would be a small number , lay still a half second , depending on how "green" they are and what the outside temps are and the etc etc etc .....a deep hooked fish will often flounce considerably more than a paper lip hooked one
of course there are tricks to everything , ever tried the big trout laying in the palm of your hand on it's belly thing ?
it is amazing a fish that ridiculous stupid with the losing it's mind type of action out of the water ,would just go all sublime in a half second in that pose ....for sure ....