Dean's grin fades a little and he becomes more interested in his coffee.

"Lady by name of Bela Talbot was tryin' to get her hands on it," he says. "She liked to steal supernatural items and sell 'em to the highest bidder. We didn't know what it was when we grabbed it. She hired two thugs to break into Dad's storage locker and steal the damn thing, but things went south, we tracked them down and wham. Sam gets the curse but good. Almost got killed by a couple of rogue hunters who thought he was an abomination, yada yada yada."

In other words, just a usual day for the Winchester brothers.