My uncle had shot a black bear up our camp many years ago. It dropped and was DRT. He waited a good while before going over to it. Did the usual poke in the eye and it didn't blink. Dead - right?
So he leaned his rifle against a nearby tree and rolled the big guy over onto its back. Took out his knife and started to dress him out. He must have hit a nerve or something because the rear leg kicked. his reaction was to toss his knife and reach for his rifle. He slipped and his calf came down on his bear blood soaked blade going in up to the hilt. The bear was dead. But my uncle spent the next 45 days in the hospital fighting off a nasty cut and infection.