What's a deadly animal most people think are docile?

I also remember this one time my family was freaking out cause I was petting this cow. (We have some crazy cattle) But seriously I had takin my time everyday getting to pet more and more till I had a cow friend. I mean. It takes time, and when the cow realizes you feed them corn everyday? Most animals(mainly herbivores) won't bite the hand that feeds them. Idk. It's the people who think it's safe to pet, etc right off the bat. And don't even feed them are the idiots. It's food in exchange for loving pets. Not the other way around.