man walks into a bank, gets in line, and when it is his turn he pulls out

a gun and robs the bank.

To make sure he leaves no witnesses he turns around and asks the next

customer in line,"Did you see me rob this bank?"

The customer replies, "Yes," whereupon the robber shoots him in the

head and kills him.

The robber quickly moves to the next customer in line and says to the

man, "Did you see me rob this bank?"

The man calmly responds, "No, but my wife did."

a lethal combination of smart dairyair and dumb dairyair .