UPDATE, UPDATE!

I finally got around to fixing that stupid bug that makes you go ragdoll after walking through particular doors.

The issue was that a door may teleport you to a worldspace that is far lower than the door you activated. Since my mod checks your
position to determine your fall speed, it will trigger the ragdoll effect even if you are teleported downwards via door activation.

I made it so that the mod not only checks your position to determine how fast you're falling, but also checks to see if your
previous position was in a different worldspace.

BRUTAL FALL DAMAGE

This mod makes falling extremely dangerous and may make your playing experience significantly harder.

If you fall for a long enough time, your character will go ragdoll and crash into the ground. If that happens, your character's body parts will take limb damage, especially their legs. HP fall damage is also increased in a way that is more realistic.

As a point of reference, jumping from the Tops Casino balcony (as pictured in the screenshots) will make your character go ragdoll half of the time and reduce a bit of HP. Falling from the high walkways inside the Hoover Dam (also depicted in screenshots) will always cause the character to go limp and will almost certainly kill the them, unless their endurance level is very, very high.

Falling from high distances will no longer be a walk in the park. Download this mod if you want your experience to be more realistic, brutal, and difficult.

Props to Mooilo, who made the original "Helpless Falling" mod. I copied some of your script to learn how to make this mod.

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I also make YTP's.