Originally Posted by
ColMcStacky
I know Claw Swipe (blue-line), Thrash t3 (not sure about t1/t2), and Bash (at least before u23.1.7) all knockback the target occasionally. I think it's a proc chance though, as it doesn't seem to happen every time. Also, I think different skills may possibly have a different proc chance of the knockback. Claw Swipe seems to do it the most in my experience, then Thrash t3, then Bash, but that honestly may just be confirmation bias.
The fun part is when you knockback an enemy while they are in water, they will sometimes slowly glide along the surface for 15-20m. :)