Ragdoll Time control

Hey guys I am trying to find an addon that someone was using in a server. Basically i launched a raagdoll from a catapult and they were then controlling it and made it basically rewind (only the ragdoll) and they could play it again or reqind it again and it was pretty kickass. I was wondering if anyone knew what it was? thanks guys.

I think the time grenade can do that.
It was either rewind the targeted prop or slow it down.

I forget.

But if you liked what they were doing, this might be an interesting DL for you.