Search:

Banged a quick video together for an example.
You can see them stiffen up then start to move a few seconds later as the shock passes through.

https://www.youtube.com/watch?v=6Qs7RbKbuZ0

Same! I know you weren't questioning, I'm intrigued by the idea too.

It's often seen on Rabbits with the little 17's. First time I shot one with an Hm2 it looked like it was being electrocuted. I...

Not sure, but isn't that the whole point with Hydrostatic shock? Nothing dies instantly unless you smack it in the head, even then it's brain dead but the heart is still pumping for a little while? I...