Six percent of people think they can beat a grizzly bear
I envision this is a cage match like Thunderdome. So we are toast without weapons. Our big brains only become delicacies to larger animals. We are slow, weak and have no outer protective exoskeleton or shell. With our soft bodies and exposed critical areas (stomach, face) we just don’t have a chance against speed/power mixed with claws and sharp pointed teeth.
Anything that is a predator bigger than a house cat and humans are done unless they know how to fight like Kimbo Slice or have a knife.
Hand to hand we have no chance even against large dogs 1 on 1. Now give us even gladiator weapons and the we got a chance against any of them. Not a great chance but without them we are in the goose and house cat level of threat