Most Center controllers don’t have a highly developed sense of humor about radar limitations, but one I heard at Jacksonville Center does:
Cessna:
“JAX Center, Cessna One Two Three Four.”
Center:
“Cessna One Two Three Four, JAX Center. Go ahead.”
Cessna:
“Cessna One Two Three Four is 20 miles north of Jacksonville, 1500 feet, and we would like flight following.”
Center:
“I would like to oblige, but at that altitude the only radar picking you up would be the highway patrol.”
Barry L. Steinman
via e-mail