Overcoming Adversity I Didn't Realize I Was Facing

So last night I stopped at a gas station and filled my truck up with gas. When I went into the little store to buy some gum, the cashier's choice of words troubled me:

"Hey buddy, how you holding up?"
"You doing okay there, guy?"
"All set there, man? You hanging in there?"
"Okay, take care of yourself, man. Take it easy."

After I left, I wondered if there was some horrible event that had happened to me. And if maybe the gas station attendant somehow knew about it before I did.