The whole thing is a bug which allowed to float in the air and water to summon mounts.
However, this is a hack with Fly and NoClip needed.
First First you kill your character in the vicinity of water and give him a free spirit.
Second Now she jumps into the water with the Spirit.
Third Activated at the hack and fly NoClip and keeps the space bar until your character floats above the water table.
4th Floats on your body, and revives you.
5th Disabled NoClip closes and the hack.