I remember Murphy well!
Aragorn is a strong pup! I thought that it was a shepherd pup thing, but apparently not! (Dh gets his back ranked when things like that happen.)
Let's hope that, now that he's back to off-leash, at least in the yard, that you won't be unseated again! Sheesh!
I hope that you aren't hurt, and that if you are in pain, that it heals quickly. I can't imagine your hand and knees not still hurting.
Love All Life, Thank You For Posting! :)