Note : Contains spoilers of the game























1. Enter the flooded apartments where you have to get the ladder, you can use the console to know if you are on the right map by typing "stat" , the map should be c_apartment3sick

2. Go all the way down till you reach the staircase for the basement











3.Next get on top of the door that is shown by the red arrow on the door by crouching into it and getting into the corner, i recommend you dive then jump up into the corner if you are struggling to get up










4.Upon getting into the corner of the door, spam the jump key for alot of times, i recommend you use your scroll wheel, you can bind it into a scroll wheel in settings or with the console by doing
" bind mwheelup +jump " (no quotes or spaces at start or end)


upon doing so, you may exit the water, now if done correctly, every time you jump you won't lose any stamina

Done




tbh, i actually think this can be done anywhere where you can crouch into a corner where there is a ceiling and a little bit of water bellow you, if there is just enough water every time you jump you won't lose stamina, you might be able to pull this trick off anywhere, tho im not sure, the person who found this found it here, tho it might be possible to use it somewhere else

If you don't feel like reading all the text or its too confusing here is a video of it

https://www.youtube.com/watch?v=K3L37ha-ntc


credits to @mogulminister , i did not make this.