the sleeping assasin

I think my father is a secret agent. He did back springs when I was young and has the biggest muscles for a man who never goes to the gym. He's ridden a horse down a "Man From Snowy River" hill to pick my hat up from the ground when I dropped it riding. He's split his hand wide open stringing a barbed wire fence and he can shoot like a son of a gun.
It doesn't add up.