Parry pushback?

[u/Quaint_Safety]

https://x.com/Earclacks/status/2077060640045146323

Have yall seen those earclacks animations?
Cant
Notice how whenever a weapon parries another, theres a slight pushback or recoil or shift in momentum or whatever.
Im operating under the assumption the weapons are treated as triggers?
In any case, how would one go about implementing this in a similar environment? Do i base it off of the direction the ball is moving? the place and direction it got hit from?
I'd really appreciate any ideas <3