A man with a gun went into a bank and demanded their money.

Once he was given the money, he turned to a customer and asked, 'Did you see me rob this bank?'

The man replied, 'Yes sir, I did.' The robber then shot him and killed him instantly.

He then turned to a couple standing next to him and asked the man, 'Did you see me rob this bank?'

The man replied,

"No sir, but my wife did"