I did the Tarzan challenge once, accidentally, when I didn't know having wrestling as your highest skill would start you out without weapons or armor. As a kobold. While exploring the cave for phat l3wtz, a cave crocodile attacked me. I threw sand, then strangled it to death.
Then on the way to the nearest humie town, I got attacked by a half dozen cougars and bears, while still unarmed. Threw rocks, strangled them all, survived.
Got a spear and shield, then encountered my first wolf pack. That had to be the most epic and memorable battle I've ever had. Started next to a murky pool, and got knocked in along with 2 wolves. Somehow managed to survive with only a broken leg, while fighting the 2 in the water, and 2 more on the shore!
I crawled out and saw one of the shore wolves limping away. Unable to stand on the broken leg, I gave chase and finished it off. That'll teach you to attack things that are smaller than you! But then 2 more wolves ran out from behind trees, in opposite directions, and charged! I stabbed one in the upper body, and the spear got stuck, so I grabbed the other one by the neck with my -iron shield-. Alternating between twisting the spear and strangling the other wolf, I defeated the entire pack. As a kobold wrestler wearing nothing but a tunic and loincloth.