My favorite was this 82 year old man in Independence, MO. I went on a tune-up and he had this 40 year old equipment that he wanted us maintain, even though he already maintained it himself.
He was in great health for an 82 year old man and wanted me to know about it.
He asked me, "Have you ever seen an 82 year old man do this."
I answered a call in the middle of the night for a customer who had no heat.