They said "almost". But it seems to me that a rabbit could definitely take a finger or sever an Achilles tendon, maybe badly fuck up a wrist.
Plus amputation could be due to an out of control infection or something like that. Wounds are complicated.
I can only understand this if they were incapcitated, unconscious... I mean just kick it off, it weighs a few ounces. How does a rabbit do enough damage to require amputation of the effing leg!?! Think how small a rabbits mouth is, they dont each meat so it would take them a long time to chow down on your leg. Theyre weaker than a cat, unless its one of those massive hares, and have you ever heard a cat mauling someones leg off? I need to see either the size of this rabbit, or the size of this person.