My old man's joke

So I went for the job at one of the big banks in the city as a customer service type person and my old man offered to drive me to the station. On the way he told me this joke..

There was a bank robber and he walked into a bank to rob it. He pulled out his shotgun, waved it in the air and his mask fell off. He quickly picked it up and strapped it back on his face. He went over to the first bank teller and asked "Did you see my face?" The bank teller answered that he had and the bank robber shot him dead. The bank robber went to the next teller and asked "Did you see my face?" and the bank teller answered "Yes" so the bank robber shot him dead. Finally the bank robber walks up to one of the customers that was at the head of the line at the time of the robbery and asked him "Did you see my face?"

The guy answered "No, I didn't, but my wife did"

A week later me and my old man went to visit my brother. My brother was talking about going to play a poker game at the casino. My old man told the same joke changing the bank details to casino details....without batting an eyelid.