this mod launches you when you get punched by an npc

You need SHVDN (Script Hook V Dot NET), Script Hook V

If you already installed the 2, make a folder called scripts
if this folder already exists, drop both the dll and ini file into the folder. 

What does the .ini do?

KnockbackForce
Changes how far you get launched horizontally

UpwardPop
Changes how far you get launched vertically

DetectionRadius
Radius of how close an npc fighting you has to be to launch you, you probably don't need to change this

RagdollDurationMS
How long you're forced to stay ragdolled in milliseconds. You probably dont need to change this

CooldownMs
Minimum cooldown of getting launched by a punch