"I went into a French restaraunt and asked the waiter, 'Have you got frog's legs?' He said, 'Yes,' so I said, 'Well hop into the kitchen and get me a cheese sandwich.'"

This quote by Tommy Cooper is an amusing method of revealing the concept that the waiter was not able to supply the consumer with what they requested for. The customer requested for frog's legs, however the waiter was unable to offer them. The client then jokingly asked the waiter to "hop into the kitchen area and get me a cheese sandwich," indicating that the waiter was not able to provide the frog's legs, so he ought to rather provide something else. This quote is a humorous way of expressing the idea that the waiter was unable to provide the consumer with what they asked for, and it also indicates that the consumer was not satisfied with the waiter's reaction. It is a lighthearted way of revealing the idea that the consumer was unable to get what they wanted.