A 23kN load is a measure of force. If that force is static (not moving, just a dead weight hanging) then we can convert that force to a weight of 2300 kg, which for you 'mericans means 5070.63 lbs, or a small car. Climbing rated carabiners are amazingly strong for their size and weight.
Now if take into account the fact that the object being measured for force is moving, then that's when things get interesting. Say you're getting into your hammock and simply flop yourself in. Not really a fall, but flop yourself in a top entry hammock. If you ignore the fact that your feet are on the ground slowing your decent, then the centre of gravity for your mass falls, say at most 2 ft? Given that F=ma, and the example above of someone being around 200 lbs...
Just dropping into your hammock from 2 ft up will exert a force of 1195.9 lbs.
Just some more wood for the fire.
(man I hope my math is right on this one, I can't remember how to do this stuff anymore)