How to stop carp flapping around when out of the water
Fish do not like being removed from the water and carp are no exception. They probably don't really know what's going on and want to get away from what they probably perceive as an enemy. This is probably why fish flap and completely freak out wind out of the water. Even experienced anglers may have difficulties in controlling a large flapping carp. Inexperienced anglers can often become flustered and panic when fish start flapping. What you want to avoid is a fish flapping itself out of the net onto the bank where it could injure itself.
I've discovered an easy way to keep a fish calm when it's out of of the water. All you need to do is use a small towel or piece of cloth and cover the fishes eyes. Doing this seems to calm them down and you can prepare them so they are ready to go back in the water without having to worry about them flapping all over the place.