Joke: tough as nails

A guy strutted into a bar bragging, *“I can take anything life throws at me. I’m tough as nails.”*

A woman smirked and said, *“Wanna bet the next round of drinks on that?”*

He grinned. *“You’re on.”*

She grabbed him by the shoulders and kneed him in the balls so hard she heard a crunch. He collapsed, squealing on the floor.

She glanced down at her hand, sighed, and said, *“Oh no… I think I broke a nail.”*