"SO, how to tell it these three X Y Z numbers dynamically? "
Hello,
I know this post was from 2018 but anyway, some of the reply helped me a lot to get my pawn bounce so I will try to help as well if the probleme is still alive.
Actually I don’t know how does the VR pawn work but if it has a “forward vector”, you could use use with the node “Mirror vector by normal” and the normal would be the “Impact normal” from the hit result (if you have a hit result, otherwise you could try to get the normal from the wall idk how :x ) and then multiply the resultat by x := 100 y= 100 z =100 or whatever offset.
Then you could plug the result in your “Set Physics Linear Velocity” Node.
Idk if it can work like it in VR but well at least I tried to help 