Falling, physics, collision and character

I would like to have some collision and physics applied to an NPC.
like the video here : Jon Rafman, Disasters under the Sun (2019) on Vimeo
(the first 30 secs)

I don’t know where to start :
I would like to have the NPC fall, collide against scene elements…
I am trying to have that in the level sequence, so as an animation to be rendered out

I don’t know where to start, what tutorial to watch…
I lliked into collision in my metahuman, but I can’t see the effect, and I could not apply the gravity either…

if you could point me to a direction, it would be reaaaaaally helpful, thank you!

answering to my own question.
it is called a ragdoll.
then I can find tutorials on them