It looked like it was going to be one of those lunches where frustration gets the better of you and ruins it.

I was being bothered by flies, and managed to knock my knife onto the floor. How could I leave my food to get a new knife?

One of the waitresses came to my rescue. Before I'd even thought about standing up to go and get a new knife, and without asking what the issue was, she arrived with a new knife.

I tipped well when I left (25% of the cost of the meal), and told her that she had rescued me - and how brilliant my dining experience had been because she had anticipated my need before I'd even voiced it.