What is the most dangerous animal, that you think you could kill? (Details)

I’ve asked, or responded, to a similar question.

Some friends, and I, had a debate, about if I could kill a kangaroo. One, on one. No weapons involved.

My opinion, was that, I could.

I know that I have no chance, against a Tiger, Bear, Lion etc.

But I’m confident that I could kill, most other animals.