Top 10 toughest guys in UFC

First off, every fighter that steps into the Octagon is tough.

We get it.

But for some, their toughness exceeds those over the normal man. Some seem to feel no pain, some seem to strive on it.  

Some would seem to fit right in with the zombies on "The Walking Dead" because, no matter what you do to them, they keep coming after you.

You can call it heart or determination, but whatever it is, these 10 fighters have it on another level.