I found a neat little way to bring some individuals down to size . . .
I used to invent 'contacts' that weren't there. He soon quietened down when he thought his eyes were going!
"Contact eleven o'clock, left to right just above the horizon"
Response "I can't see it"
Reply: "It's just gone behind that cloud"
Do that two or three times on a sector and you get listened to with more respect.
Naughty, but it used to brighten up my day!