.....when you are in a check out line in a the supermarket and the person at the front of the line can't get it right.
I was that person today.
I was trying to use the debit/credit card machine at a local market.
Attempt # 1 I removed the card before the clerk/cashier had processed the button on the till which indicates that the purchase is complete.
Attempt # 2 All went well until when the screen asked me to confirm the amount I pressed "No" instead of "Yes".
Attempt # 3. I pressed all the buttons with success, but removed the card too soon.
By this time I knew that I had been pegged as a decrepit old man!
But the clerk/cashier (a smiling Mennonite/Amish young woman - I could tell by her head covering) had evidently learned to be graciously patient - probably through listening to long and dreary sermons from decrepit old preachers - was utterly patient with me.
Attempt # 4. I took it very slowly and with a smile
Hey Presto - fourth time a charm!
I turned to the clerk/cashier and her trainee, and to the four people in line behind me and said (with a grin on my face) "I'm sorry, but I don't get out very often".
There were smiles and laughter all around.